diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6d6dce7af..9847b813f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -139,4 +139,4 @@ jobs:
           composer-options: "--no-scripts"
 
       - name: Rector
-        run: make rector
+        run: make rector
\ No newline at end of file
diff --git a/Makefile b/Makefile
index e2a4492c1..59da19938 100644
--- a/Makefile
+++ b/Makefile
@@ -97,7 +97,7 @@ test-functional: data config htdocs/uploads tmp
 	CURRENT_UID=$(CURRENT_UID) $(DOCKER_COMPOSE_BIN) stop dbtest apachephptest mailcatcher
 	CURRENT_UID=$(CURRENT_UID) $(DOCKER_COMPOSE_BIN) up -d dbtest apachephptest mailcatcher
 	make clean-test-deprecated-log
-	CURRENT_UID=$(CURRENT_UID) $(DOCKER_COMPOSE_BIN) run --no-deps --rm -u localUser apachephp ./bin/behat
+	CURRENT_UID=$(CURRENT_UID) $(DOCKER_COMPOSE_BIN) run --no-deps --rm -u localUser apachephp ./bin/behat --colors
 	make var/logs/test.deprecations_grouped.log
 	CURRENT_UID=$(CURRENT_UID) $(DOCKER_COMPOSE_BIN) stop dbtest apachephptest mailcatcher
 
diff --git a/app/config/config.php b/app/config/config.php
deleted file mode 100644
index abe8a5af9..000000000
--- a/app/config/config.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-/**
- * On charge les parameters depuis le .env ou .env.dist avec une conversion de nom en minuscule.
- * À la migration vers Symfony 4+ ceci ne sera plus utile.
- * On fait ça à cause du bundle Ting qui ne peut utiliser les "%env()%" comme paramètre.
- */
-$path = dirname(__FILE__, 3);
-$envFile = is_file($path . '/.env') ? $path . '/.env' : $path . '/.env.dist';
-$lines = file($envFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
-foreach ($lines as $line) {
-    if (str_starts_with(trim($line), '#')) {
-        continue;
-    }
-
-    [$name, $default] = explode('=', $line, 2);
-    // On va chercher dans les variables d'env en premier
-    if (!$value = getenv($name)) {
-        $value = $default;
-    }
-    $name = strtolower(trim($name));
-    $value = trim($value);
-    if (is_numeric($value)) {
-        $value = (int) $value;
-    } else {
-        $value = trim($value, '"');
-    }
-
-    $container->setParameter($name, $value);
-}
diff --git a/app/config/config.yml b/app/config/config.yml
index 3935ccc36..ef9d75497 100644
--- a/app/config/config.yml
+++ b/app/config/config.yml
@@ -1,5 +1,4 @@
 imports:
-    - { resource: config.php }
     - { resource: security.yml }
     - { resource: services.yml }
     - { resource: packages/http_client.yaml }
@@ -160,6 +159,14 @@ parameters:
                 forum_sessions:
                     nom: 'Conférences'
                     niveau: 'ROLE_FORUM'
+                admin_event_themes_list:
+                    nom: 'Thèmes'
+                    niveau: 'ROLE_FORUM'
+                    url: '/admin/event/themes'
+                    extra_routes:
+                        - admin_event_themes_list
+                        - admin_event_themes_add
+                        - admin_event_themes_edit
                 forum_vote_github:
                     nom: 'Votes visiteurs'
                     niveau: 'ROLE_FORUM'
@@ -315,7 +322,7 @@ framework:
         fallbacks: ["%locale%"]
         enabled: true
         default_path: "%kernel.project_dir%/../translations"
-    secret:          "%secret%"
+    secret:          "%env(SECRET)%"
     router:
         resource: "%kernel.project_dir%/config/routing.yml"
         strict_requirements: ~
@@ -351,7 +358,7 @@ twig:
     strict_variables: "%kernel.debug%"
     globals:
       photo_storage: '@AppBundle\CFP\PhotoStorage'
-      global_menu_event_label: '%afup_global_menu_event_label%'
+      global_menu_event_label: '%env(AFUP_GLOBAL_MENU_EVENT_LABEL)%'
     form_themes: ['form_theme.html.twig']
     exception_controller: null
     default_path: "%kernel.project_dir%/../templates"
@@ -363,9 +370,9 @@ ting:
             charset: utf8mb4
             master:
                 host:     "%database_host%"
-                port:     "%database_port%"
-                user:     "%database_user%"
-                password: "%database_password%"
+                port:     "%env(int:DATABASE_PORT)%"
+                user:     "%env(DATABASE_USER)%"
+                password: "%env(DATABASE_PASSWORD)%"
 
     repositories:
         event:
@@ -374,14 +381,14 @@ ting:
             options:
                 default:
                     connection: main
-                    database: '%database_name%'
+                    database: '%env(DATABASE_NAME)%'
         site:
             namespace : AppBundle\Site\Model\Repository
             directory : "@AppBundle/Site/Model/Repository"
             options:
                 default:
                     connection: main
-                    database: '%database_name%'
+                    database: '%env(DATABASE_NAME)%'
 
         association:
             namespace : AppBundle\Association\Model\Repository
@@ -389,35 +396,35 @@ ting:
             options:
                 default:
                     connection: main
-                    database: '%database_name%'
+                    database: '%env(DATABASE_NAME)%'
         throttling:
             namespace : AppBundle\Security\ActionThrottling
             directory : "@AppBundle/Security/ActionThrottling"
             options:
                 default:
                     connection: main
-                    database: '%database_name%'
+                    database: '%env(DATABASE_NAME)%'
         techletter:
             namespace: AppBundle\TechLetter\Model\Repository
             directory: "@AppBundle/TechLetter/Model/Repository"
             options:
                 default:
                     connection: main
-                    database: "%database_name%"
+                    database: "%env(DATABASE_NAME)%"
 
 knpu_oauth2_client:
     clients:
         # will create a service: knpu.oauth2.client.facebook_main
         github_main:
             type: github
-            client_id: "%github_client_id%"
-            client_secret: "%github_client_secret%"
+            client_id: "%env(GITHUB_CLIENT_ID)%"
+            client_secret: "%env(GITHUB_CLIENT_SECRET)%"
             # see below
             redirect_route: connection_github_check
 
 ewz_recaptcha:
-    public_key: '%recaptcha_public_key%'
-    private_key: '%recaptcha_private_key%'
+    public_key: '%env(RECAPTCHA_PUBLIC_KEY)%'
+    private_key: '%env(RECAPTCHA_PRIVATE_KEY)%'
 
 
 ekino_new_relic:
diff --git a/app/config/config_dev.yml b/app/config/config_dev.yml
index e68908a2a..d736d56a0 100644
--- a/app/config/config_dev.yml
+++ b/app/config/config_dev.yml
@@ -33,6 +33,7 @@ monolog:
 
 parameters:
     paybox_ips: [127.0.0.1, 192.168.42.1]
+    database_host: "db"
 
 #swiftmailer:
 #    delivery_address: me@example.com
diff --git a/app/config/config_prod.yml b/app/config/config_prod.yml
index f9e8f2a04..e468aa315 100644
--- a/app/config/config_prod.yml
+++ b/app/config/config_prod.yml
@@ -1,6 +1,9 @@
 imports:
     - { resource: config.yml }
 
+parameters:
+    database_host: "%env(DATABASE_HOST)%"
+
 #doctrine:
 #    orm:
 #        metadata_cache_driver: apc
diff --git a/app/config/routing/admin_event.yml b/app/config/routing/admin_event.yml
index 86e76fa97..d0da346b3 100644
--- a/app/config/routing/admin_event.yml
+++ b/app/config/routing/admin_event.yml
@@ -105,3 +105,22 @@ admin_event_restore:
 admin_event_votes:
   path: /votes
   defaults: {_controller: AppBundle\Controller\Admin\Event\VotesListeAction}
+
+admin_event_themes_add:
+  path: /themes/add
+  defaults:
+    _controller: AppBundle\Controller\Admin\Event\EventThemeAddEditAction
+    id: null
+
+admin_event_themes_edit:
+  path: /themes/edit/{id}
+  defaults: {_controller: AppBundle\Controller\Admin\Event\EventThemeAddEditAction}
+  requirements:
+    id: \d+
+
+admin_event_themes_list:
+  path: /themes/
+  requirements:
+    id: \d+
+  defaults:
+    _controller: AppBundle\Controller\Admin\Event\EventThemeAction
diff --git a/app/config/security.yml b/app/config/security.yml
index df30ff187..0c6d17012 100644
--- a/app/config/security.yml
+++ b/app/config/security.yml
@@ -66,7 +66,7 @@ security:
         - { path: ^/admin/(members/reporting|association/relances|talk|slackmembers/check|healthcheck), roles: ROLE_ADMIN}
         - { path: ^/member, roles: [ROLE_USER, ROLE_MEMBER_EXPIRED]}
         - { path: ^/admin/, roles: ROLE_MEMBER_EXPIRED }
-        - { path: ^/blog, allow_if: "request.getClientIp() in ['217.70.189.71', '127.0.0.1', '192.168.42.1'] or request.server.get('ALLOW_BLOG_FROM_ALL') == 1 or request.headers.get('x-afup-blog-api-key') == '%blog_api_key%'" }
+        - { path: ^/blog, allow_if: "request.getClientIp() in ['217.70.189.71', '127.0.0.1', '192.168.42.1'] or request.server.get('ALLOW_BLOG_FROM_ALL') == 1 or request.headers.get('x-afup-blog-api-key') == '%env(BLOG_API_KEY)%'" }
         - { path: ^/blog, roles: ROLE_NO_ACCESS }
         - { path: ^/(event/\w+/tickets|association)paybox-callback, roles: PUBLIC_ACCESS, ips: "%paybox_ips%" }
         - { path: ^/(event/\w+/tickets|association)paybox-callback, roles: ROLE_SUPER_ADMIN }
diff --git a/app/config/services.yml b/app/config/services.yml
index 85ab8426d..3125645ae 100644
--- a/app/config/services.yml
+++ b/app/config/services.yml
@@ -4,8 +4,12 @@ parameters:
     app.badge_dir: "%kernel.project_dir%/../htdocs/uploads/badges"
     app.members_logo_dir: "%kernel.project_dir%/../htdocs/uploads/members_logo"
     app.general_meetings_dir: "%kernel.project_dir%/../htdocs/uploads/general_meetings_reports"
-    bluesky.api.identifier: "%bluesky_api_identifier%"
-    bluesky.api.app_password: "%bluesky_api_app_password%"
+    bluesky.api.identifier: "%env(BLUESKY_API_IDENTIFIER)%"
+    bluesky.api.app_password: "%env(BLUESKY_API_APP_PASSWORD)%"
+    database_name: "%env(DATABASE_NAME)%"
+    database_user: "%env(DATABASE_USER)%"
+    database_password: "%env(DATABASE_PASSWORD)%"
+    database_port: "%env(DATABASE_PORT)%"
 
 services:
 #    service_name:
@@ -25,9 +29,9 @@ services:
     Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler:
         public:    false
         arguments:
-            - 'mysql:host=%database_host%;port=%database_port%;dbname=%database_name%'
-            - db_username: '%database_user%'
-              db_password: '%database_password%'
+            - 'mysql:host=%database_host%;port=%env(int:DATABASE_PORT)%;dbname=%env(DATABASE_NAME)%'
+            - db_username: '%env(DATABASE_USER)%'
+              db_password: '%env(DATABASE_PASSWORD)%'
               lock_mode: !php/const Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler::LOCK_NONE
 
     AppBundle\:
@@ -78,19 +82,19 @@ services:
 
     AppBundle\Payment\PayboxFactory:
         autowire: true
-        arguments: ["@router", "%paybox_domain_server%", "%paybox_secret_key%", "%paybox_site%", "%paybox_rang%", "%paybox_identifiant%"]
+        arguments: ["@router", "%env(PAYBOX_DOMAIN_SERVER)%", "%env(PAYBOX_SECRET_KEY)%", "%env(PAYBOX_SITE)%", "%env(PAYBOX_RANG)%", "%env(PAYBOX_IDENTIFIANT)%"]
 
     AppBundle\Slack\LegacyClient:
-        arguments: ["%slack_members_legacy_token%"]
+        arguments: ["%env(SLACK_MEMBERS_LEGACY_TOKEN)%"]
 
     Algolia\AlgoliaSearch\SearchClient:
         factory: [ Algolia\AlgoliaSearch\SearchClient, create ]
-        arguments: ["%algolia_app_id%", "%algolia_backend_api_key%"]
+        arguments: ["%env(ALGOLIA_APP_ID)%", "%env(ALGOLIA_BACKEND_API_KEY)%"]
 
     # API/Client Meetup techletter
     app.mailchimp_techletter_client:
         class: DrewM\MailChimp\MailChimp
-        arguments: ["%mailchimp_techletter_api_key%"]
+        arguments: ["%env(MAILCHIMP_TECHLETTER_API_KEY)%"]
         public: false
     app.mailchimp_techletter_api:
         class: AppBundle\Mailchimp\Mailchimp
@@ -100,7 +104,7 @@ services:
     # API/Client Meetup
     app.mailchimp_client:
         class: DrewM\MailChimp\MailChimp
-        arguments: ["%mailchimp_api_key%"]
+        arguments: ["%env(MAILCHIMP_API_KEY)%"]
         public: false
     app.mailchimp_api:
         class: AppBundle\Mailchimp\Mailchimp
@@ -111,13 +115,13 @@ services:
         autowire: true
         arguments:
             $mailchimp: '@app.mailchimp_techletter_api'
-            $listId: "%mailchimp_techletter_list%"
+            $listId: "%env(MAILCHIMP_TECHLETTER_LIST)%"
 
     AppBundle\Mailchimp\MailchimpMembersAutoListSynchronizer:
         autowire: true
         arguments:
             $mailchimp: '@app.mailchimp_api'
-            $listId: "%mailchimp_members_list%"
+            $listId: "%env(MAILCHIMP_MEMBERS_LIST)%"
 
     Afup\Site\Utils\Configuration:
         autowire: true
@@ -130,7 +134,7 @@ services:
     AppBundle\Mailchimp\EventEventSubscriber:
         arguments:
             - '@app.mailchimp_api'
-            - "%mailchimp_members_list%"
+            - "%env(MAILCHIMP_MEMBERS_LIST)%"
         tags:
           - { name: kernel.event_listener, event: user.disabled, method: onUserDisabled }
 
@@ -140,7 +144,7 @@ services:
 
     AppBundle\Event\Ticket\QrCodeGenerator:
         autowire: true
-        arguments: ["%qr_code_salt%"]
+        arguments: ["%env(QR_CODE_SALT)%"]
 
     Afup\Site\Forum\AppelConferencier:
         class: Afup\Site\Forum\AppelConferencier
@@ -185,7 +189,7 @@ services:
 
     geocoder_provider_google_maps:
         class: Geocoder\Provider\GoogleMaps\GoogleMaps
-        arguments: ['@Psr\Http\Client\ClientInterface', null, "%google_maps_api_key%"]
+        arguments: ['@Psr\Http\Client\ClientInterface', null, "%env(GOOGLE_MAPS_API_KEY)%"]
 
     AppBundle\Offices\OfficeFinder:
         arguments: ['@geocoder']
diff --git a/bin/console b/bin/console
index 1f510065b..f9032c4c6 100755
--- a/bin/console
+++ b/bin/console
@@ -3,6 +3,7 @@
 
 use Symfony\Bundle\FrameworkBundle\Console\Application;
 use Symfony\Component\Console\Input\ArgvInput;
+use Symfony\Component\Dotenv\Dotenv;
 
 // if you don't want to setup permissions the proper way, just uncomment the following PHP line
 // read http://symfony.com/doc/current/book/installation.html#configuration-and-setup for more information
@@ -16,6 +17,7 @@ $loader = require __DIR__.'/../vendor/autoload.php';
 $input = new ArgvInput();
 $env = $input->getParameterOption(['--env', '-e'], getenv('SYMFONY_ENV') ?: 'dev');
 $debug = getenv('SYMFONY_DEBUG') !== '0' && !$input->hasParameterOption(['--no-debug', '']) && $env !== 'prod';
+(new Dotenv())->bootEnv(dirname(__DIR__).'/.env');
 
 $kernel = new AppKernel($env, $debug);
 $application = new Application($kernel);
diff --git a/compose.yml b/compose.yml
index 3b0990e04..022efe959 100644
--- a/compose.yml
+++ b/compose.yml
@@ -52,6 +52,7 @@ services:
         ENABLE_XDEBUG: ${ENABLE_XDEBUG:-false}
     environment:
       SYMFONY_ENV: "test"
+      APP_ENV: "test"
       HOST_PWD: ${PWD}
       SYMFONY_IDE: "%env(IDE_USED)%://open?url=file://%%f&line=%%l&/var/www/html/>%env(HOST_PWD)%/"
     env_file:
diff --git a/composer.json b/composer.json
index bb1fabcf7..85b16d2be 100644
--- a/composer.json
+++ b/composer.json
@@ -44,6 +44,7 @@
     "symfony/asset": "7.3.*",
     "symfony/clock": "7.2.*",
     "symfony/console": "7.3.*",
+    "symfony/dotenv": "7.3.*",
     "symfony/expression-language": "7.3.*",
     "symfony/form": "7.3.*",
     "symfony/framework-bundle": "7.3.*",
@@ -99,7 +100,10 @@
     "symfony-web-dir": "htdocs",
     "symfony-bin-dir": "bin",
     "symfony-var-dir": "var",
-    "symfony-tests-dir": "tests"
+    "symfony-tests-dir": "tests",
+    "symfony": {
+      "require": "7.3.*"
+    }
   },
   "autoload": {
     "psr-4": {
diff --git a/composer.lock b/composer.lock
index 735e1c14e..97825575f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "83de42cafc1225e87c29944bd604621b",
+    "content-hash": "f8d8a6eb9bbc82fe481e0ca05d4b86d9",
     "packages": [
         {
             "name": "algolia/algoliasearch-client-php",
@@ -5487,6 +5487,84 @@
             ],
             "time": "2024-09-25T14:21:43+00:00"
         },
+        {
+            "name": "symfony/dotenv",
+            "version": "v7.3.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/dotenv.git",
+                "reference": "2192790a11f9e22cbcf9dc705a3ff22a5503923a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/dotenv/zipball/2192790a11f9e22cbcf9dc705a3ff22a5503923a",
+                "reference": "2192790a11f9e22cbcf9dc705a3ff22a5503923a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.2"
+            },
+            "conflict": {
+                "symfony/console": "<6.4",
+                "symfony/process": "<6.4"
+            },
+            "require-dev": {
+                "symfony/console": "^6.4|^7.0",
+                "symfony/process": "^6.4|^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Dotenv\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Registers environment variables from a .env file",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "dotenv",
+                "env",
+                "environment"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/dotenv/tree/v7.3.2"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-07-10T08:29:33+00:00"
+        },
         {
             "name": "symfony/error-handler",
             "version": "v7.3.0",
diff --git a/db/migrations/20250701085600_add_event_themes_feature.php b/db/migrations/20250701085600_add_event_themes_feature.php
new file mode 100644
index 000000000..c940b1aa6
--- /dev/null
+++ b/db/migrations/20250701085600_add_event_themes_feature.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+use Phinx\Migration\AbstractMigration;
+
+final class AddEventThemesFeature extends AbstractMigration
+{
+    public function change(): void
+    {
+        $this
+            ->table('afup_forum')
+            ->addColumn('has_themes', 'boolean', ['null' => false, 'default' => false])
+            ->save()
+        ;
+        $this
+            ->table('afup_sessions')
+            ->addColumn('theme', 'integer', ['null' => true])
+            ->save()
+        ;
+        $this
+            ->table('afup_conference_theme')
+            ->addColumn('id_forum', 'integer', ['null' => false, 'signed' => false])
+            ->addColumn('name', 'string', ['limit' => 255])
+            ->addColumn('description', 'text', ['null' => true])
+            ->addColumn('priority', 'integer', ['null' => false, 'default' => 0])
+            ->save()
+        ;
+    }
+}
diff --git a/htdocs/app.php b/htdocs/app.php
index b7a464913..65e586ff9 100644
--- a/htdocs/app.php
+++ b/htdocs/app.php
@@ -4,10 +4,15 @@
 
 use Composer\Autoload\ClassLoader;
 use Symfony\Component\HttpFoundation\Request;
+ use Symfony\Component\Dotenv\Dotenv;
 
 $isDevEnv = isset($_ENV['SYMFONY_ENV']) && $_ENV['SYMFONY_ENV'] == 'dev';
 $isTestEnv = isset($_ENV['SYMFONY_ENV']) && $_ENV['SYMFONY_ENV'] == 'test';
 
+/** @var ClassLoader $loader */
+$loader = require __DIR__ . '/../vendor/autoload.php';
+$env = $isDevEnv ? 'dev' : ($isTestEnv ? 'test' : 'prod');
+(new Dotenv())->bootEnv(dirname(__DIR__).'/.env', $env);
 if ($_SERVER['HTTP_HOST'] === 'afup.dev' || $isDevEnv || $isTestEnv) {
     if (!$isDevEnv && !$isTestEnv
         &&
@@ -21,14 +26,8 @@
         exit('You are not allowed to access this file. Check ' . basename(__FILE__) . ' for more information.');
     }
 
-    /** @var ClassLoader $loader */
-    $loader = require __DIR__ . '/../vendor/autoload.php';
-
     $kernel = $isDevEnv ? new AppKernel('dev', true) : new AppKernel('test', true);
 } else {
-    /** @var ClassLoader $loader */
-    $loader = require __DIR__ . '/../vendor/autoload.php';
-
     $kernel = new AppKernel('prod', false);
 }
 
diff --git a/htdocs/pages/administration/forum_sessions.php b/htdocs/pages/administration/forum_sessions.php
index c193b05e2..bce5ca487 100644
--- a/htdocs/pages/administration/forum_sessions.php
+++ b/htdocs/pages/administration/forum_sessions.php
@@ -28,6 +28,7 @@
 $eventRepository = $this->eventRepository;
 $speakerRepository = $this->speakerRepository;
 $talkRepository = $this->talkRepository;
+$eventThemeRepository = $this->eventThemeRepository;
 
 $forum = new Forum($bdd);
 $forum_appel = new AppelConferencier($bdd);
@@ -166,6 +167,16 @@
     $groupe[] = $formulaire->createElement('radio', 'skill', null, 'Senior', Talk::SKILL_SENIOR);
     $formulaire->addGroup($groupe, 'groupe_skill', "Niveau", '<br />', false);
 
+    $event = $eventRepository->get($_GET['id_forum']);
+    if ($event->getHasThemes()) {
+        $groupe = [];
+        $themes = $eventThemeRepository->getBy(['idForum' => $event->getId()]);
+        foreach ($themes as $theme) {
+            $groupe[] = $formulaire->createElement('radio', 'theme', null, $theme->getName(), $theme->getID());
+        }
+        $formulaire->addGroup($groupe, 'groupe_theme', "Thème", '<br />', false);
+    }
+
     $formulaire->addElement('checkbox'    , 'needs_mentoring'          , "Demande a bénéficier du programme d'accompagnement des jeunes speakers");
     $formulaire->addElement('checkbox', 'with_workshop', "Propose un atelier");
     $formulaire->addElement('textarea', 'workshop_abstract', 'Résumé de l\'atelier', ['cols' => 40, 'rows' => 15]);
@@ -197,7 +208,6 @@
     $formulaire->addElement('checkbox', 'has_allowed_to_sharing_with_local_offices', 'Accord pour le partage aux antennes');
 
     $formulaire->addElement('header', null, 'Conférencier(s)');
-    $event = $eventRepository->get($_GET['id_forum']);
     Assertion::notNull($event);
     $conferenciers = [null => ''];
     foreach ($speakerRepository->searchSpeakers($event) as $speaker) {
@@ -278,12 +288,13 @@
                                                 (int) $valeurs['skill'],
                                                 (int) $valeurs['needs_mentoring'],
                                                 $valeurs['use_markdown'],
-                                                $valeurs['video_has_fr_subtitles'],
-                                                $valeurs['video_has_en_subtitles'],
+                                                $valeurs['video_has_fr_subtitles'] ?? null,
+                                                $valeurs['video_has_en_subtitles'] ?? null,
                                                 $valeurs['date_publication']['Y'] . '-' . $valeurs['date_publication']['M'] . '-' . $valeurs['date_publication']['d'] . ' ' . $valeurs['date_publication']['H'] . ':' . $valeurs['date_publication']['i'] . ':' . $valeurs['date_publication']['s'],
                                                 $valeurs['tweets'],
                                                 $valeurs['transcript'],
                                                 $valeurs['verbatim'],
+                                                $valeurs['theme'] ?? null,
             );
             $forum_appel->delierSession($session_id);
         }
diff --git a/sources/Afup/Forum/AppelConferencier.php b/sources/Afup/Forum/AppelConferencier.php
index 6a708d1cb..05e25f6fd 100644
--- a/sources/Afup/Forum/AppelConferencier.php
+++ b/sources/Afup/Forum/AppelConferencier.php
@@ -408,6 +408,7 @@ public function modifierSession(
         $tweets = null,
         $transcript = null,
         $verbatim = null,
+        $theme_id = null,
     ) {
         $this->_bdd->executer("SET NAMES utf8mb4");
 
@@ -467,6 +468,9 @@ public function modifierSession(
         if ($verbatim !== null) {
             $requete .= 'verbatim = ' . $this->_bdd->echapper($verbatim) . ', ';
         }
+        if ($theme_id !== null) {
+            $requete .= 'theme = ' . $this->_bdd->echapper($theme_id) . ', ';
+        }
         $requete .= ' plannifie = ' . $this->_bdd->echapper($plannifie) . ' ';
         $requete .= ' WHERE session_id = ' . (int) $id;
 
diff --git a/sources/Afup/Utils/SymfonyKernel.php b/sources/Afup/Utils/SymfonyKernel.php
index 2fda6ec81..ad03e29da 100644
--- a/sources/Afup/Utils/SymfonyKernel.php
+++ b/sources/Afup/Utils/SymfonyKernel.php
@@ -4,6 +4,7 @@
 
 namespace Afup\Site\Utils;
 
+use Symfony\Component\Dotenv\Dotenv;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\KernelInterface;
@@ -28,6 +29,7 @@ public function __construct(Request $request = null)
             $env = 'test';
         }
 
+        (new Dotenv())->bootEnv(dirname(__DIR__, 3) . '/.env', $env);
         $this->kernel = new \AppKernel($env, $debug);
         $this->kernel->boot();
         if (!$request instanceof Request) {
diff --git a/sources/AppBundle/Command/UpdateMailchimpMembersCommand.php b/sources/AppBundle/Command/UpdateMailchimpMembersCommand.php
index 0ffae73c7..7e90d7208 100644
--- a/sources/AppBundle/Command/UpdateMailchimpMembersCommand.php
+++ b/sources/AppBundle/Command/UpdateMailchimpMembersCommand.php
@@ -21,7 +21,7 @@ public function __construct(
         #[Autowire('@app.mailchimp_api')]
         private Mailchimp $mailchimp,
         private UserRepository $userRepository,
-        #[Autowire('%mailchimp_members_list%')]
+        #[Autowire(env: 'MAILCHIMP_MEMBERS_LIST')]
         private string $mailchimpMembersList,
     ) {}
 
diff --git a/sources/AppBundle/Controller/Admin/Event/EventThemeAction.php b/sources/AppBundle/Controller/Admin/Event/EventThemeAction.php
new file mode 100644
index 000000000..9b5360c5e
--- /dev/null
+++ b/sources/AppBundle/Controller/Admin/Event/EventThemeAction.php
@@ -0,0 +1,96 @@
+<?php
+
+declare(strict_types=1);
+
+namespace AppBundle\Controller\Admin\Event;
+
+use AppBundle\Controller\Event\EventActionHelper;
+use AppBundle\Event\Form\Support\EventSelectFactory;
+use AppBundle\Event\Model\Event;
+use AppBundle\Event\Model\Repository\EventThemeRepository;
+use AppBundle\Event\Model\Repository\TalkRepository;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class EventThemeAction extends AbstractController
+{
+    public function __construct(
+        private readonly EventThemeRepository $eventThemeRepository,
+        private readonly EventActionHelper $eventActionHelper,
+        private readonly EventSelectFactory $eventSelectFactory,
+        private readonly TalkRepository $talkRepository,
+    ) {}
+
+    public function __invoke(Request $request): Response
+    {
+        $id = $request->query->get('id');
+
+        $event = $this->eventActionHelper->getEventById($id);
+
+        // Handle AJAX requests for updating data
+        if ($request->isXmlHttpRequest()) {
+            return $this->handleAjaxRequest($request, $event);
+        }
+        if ($request->getMethod() === 'POST' && $request->request->has('delete')) {
+            $theme = $this->eventThemeRepository->get($request->request->getInt('theme_id'));
+            $this->eventThemeRepository->delete($theme);
+            $this->addFlash('notice', sprintf('Le thème "%s" a été supprimé.', $theme->getName()));
+            return $this->redirectToRoute('admin_event_themes_list');
+        }
+
+        $themes = $this->eventThemeRepository->getByEventOrderedByPriority($event->getId());
+        $scheduledTalks = $this->talkRepository->getScheduledTalksByEvent($event->getId());
+
+        return $this->render('admin/event/theme_list.html.twig', [
+            'themes' => $themes,
+            'scheduled_talks' => $scheduledTalks,
+            'event' => $event,
+            'event_select_form' => $this->eventSelectFactory->create($event, $request)->createView(),
+        ]);
+    }
+
+    private function handleAjaxRequest(Request $request, Event $event): JsonResponse
+    {
+        $action = $request->request->get('action');
+
+        return match ($action) {
+            'update_theme_priority' => $this->updateThemePriority($request),
+            'update_talk_theme' => $this->updateTalkTheme($request),
+            default => new JsonResponse(['error' => 'Action non reconnue'], 400),
+        };
+    }
+
+    private function updateThemePriority(Request $request): JsonResponse
+    {
+        $themeId = $request->request->getInt('theme_id');
+        $priority = $request->request->getInt('priority');
+
+        $theme = $this->eventThemeRepository->get($themeId);
+        if (!$theme) {
+            return new JsonResponse(['error' => 'Thème non trouvé'], 404);
+        }
+
+        $theme->setPriority($priority);
+        $this->eventThemeRepository->save($theme);
+
+        return new JsonResponse(['success' => true]);
+    }
+
+    private function updateTalkTheme(Request $request): JsonResponse
+    {
+        $talkId = $request->request->getInt('talk_id');
+        $themeId = $request->request->get('theme_id');
+
+        $talk = $this->talkRepository->get($talkId);
+        if (!$talk) {
+            return new JsonResponse(['error' => 'Conférence non trouvée'], 404);
+        }
+
+        $talk->setTheme($themeId ? (int) $themeId : null);
+        $this->talkRepository->save($talk);
+
+        return new JsonResponse(['success' => true]);
+    }
+}
diff --git a/sources/AppBundle/Controller/Admin/Event/EventThemeAddEditAction.php b/sources/AppBundle/Controller/Admin/Event/EventThemeAddEditAction.php
new file mode 100644
index 000000000..6b2f3da6d
--- /dev/null
+++ b/sources/AppBundle/Controller/Admin/Event/EventThemeAddEditAction.php
@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace AppBundle\Controller\Admin\Event;
+
+use AppBundle\Event\Form\EventThemeType;
+use AppBundle\Event\Model\EventTheme;
+use AppBundle\Event\Model\Repository\EventRepository;
+use AppBundle\Event\Model\Repository\EventThemeRepository;
+use AppBundle\Event\Model\Repository\TalkRepository;
+use CCMBenchmark\TingBundle\Attribute\MapEntity;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class EventThemeAddEditAction extends AbstractController
+{
+    public function __construct(
+        private readonly EventThemeRepository $eventThemeRepository,
+        private readonly EventRepository $eventRepository,
+        private readonly TalkRepository $talkRepository,
+    ) {}
+
+    public function __invoke(Request $request, #[MapEntity] ?EventTheme $eventTheme = null): Response
+    {
+        $new = false;
+        if ($eventTheme === null) {
+            $new = true;
+            $eventTheme = new EventTheme();
+            if ($request->query->has('idForum')) {
+                $eventTheme->setIdForum($request->query->getInt('idForum'));
+            }
+        } else {
+            $event = $this->eventRepository->get($eventTheme->getIdForum());
+            $talks = $this->talkRepository->getByEventWithSpeakers($event, false, false, $eventTheme->getId());
+        }
+
+        $form = $this->createForm(EventThemeType::class, $eventTheme);
+
+        $form->handleRequest($request);
+        if ($form->isSubmitted() && $form->isValid()) {
+            $this->eventThemeRepository->save($eventTheme);
+
+            $this->addFlash('notice', 'Thème ' . ($new ? 'ajouté' : 'modifié'));
+            return $this->redirectToRoute('admin_event_themes_list', ['id' => $eventTheme->getIdForum()]);
+        }
+
+        return $this->render('admin/event/theme_add_edit.html.twig', [
+            'form' => $form->createView(),
+            'eventTheme' => $eventTheme,
+            'new' => $new,
+            'talks' => $talks ?? null,
+        ]);
+    }
+}
diff --git a/sources/AppBundle/Controller/Admin/TechLetter/GenerateAction.php b/sources/AppBundle/Controller/Admin/TechLetter/GenerateAction.php
index 6d33b8c5b..d3cbb37a3 100644
--- a/sources/AppBundle/Controller/Admin/TechLetter/GenerateAction.php
+++ b/sources/AppBundle/Controller/Admin/TechLetter/GenerateAction.php
@@ -19,7 +19,7 @@ public function __construct(
         #[Autowire('@app.mailchimp_techletter_api')]
         private readonly Mailchimp $mailchimp,
         private readonly TechLetterFactory $techLetterFactory,
-        #[Autowire('%mailchimp_techletter_list%')]
+        #[Autowire(env: 'MAILCHIMP_TECHLETTER_LIST')]
         private readonly string $mailchimpTechletterList,
     ) {}
 
diff --git a/sources/AppBundle/Controller/Admin/TechLetter/SendTestAction.php b/sources/AppBundle/Controller/Admin/TechLetter/SendTestAction.php
index d9214dcd9..e6b7c575b 100644
--- a/sources/AppBundle/Controller/Admin/TechLetter/SendTestAction.php
+++ b/sources/AppBundle/Controller/Admin/TechLetter/SendTestAction.php
@@ -20,7 +20,7 @@ public function __construct(
         private readonly SendingRepository $sendingRepository,
         private readonly Mailer $mailer,
         private readonly TechLetterFactory $techLetterFactory,
-        #[Autowire('%techletter_test_email_address%')]
+        #[Autowire(env: 'TECHLETTER_TEST_EMAIL_ADDRESS')]
         private readonly string $techletterTestEmailAddress,
     ) {}
 
diff --git a/sources/AppBundle/Controller/Event/Blog/ProgramAction.php b/sources/AppBundle/Controller/Event/Blog/ProgramAction.php
index 16edbc930..1d625773a 100644
--- a/sources/AppBundle/Controller/Event/Blog/ProgramAction.php
+++ b/sources/AppBundle/Controller/Event/Blog/ProgramAction.php
@@ -6,6 +6,7 @@
 
 use AppBundle\Controller\Event\EventActionHelper;
 use AppBundle\Event\JsonLd;
+use AppBundle\Event\Model\Repository\EventThemeRepository;
 use AppBundle\Event\Model\Repository\TalkRepository;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Request;
@@ -17,13 +18,20 @@ public function __construct(
         private readonly JsonLd $jsonLd,
         private readonly EventActionHelper $eventActionHelper,
         private readonly TalkRepository $talkRepository,
+        private readonly EventThemeRepository $eventThemeRepository,
     ) {}
 
     public function __invoke(Request $request, $eventSlug): Response
     {
         $event = $this->eventActionHelper->getEvent($eventSlug);
         $jsonld = $this->jsonLd->getDataForEvent($event);
-        $talkAggregates = $this->talkRepository->getByEventWithSpeakers($event, $request->query->getBoolean('apply-publication-date-filters', true));
+        $talkAggregates = $this->talkRepository->getByEventWithSpeakers($event, $request->query->getBoolean('apply-publication-date-filters', true), $event->getHasThemes());
+        $themes = null;
+        if ($event->getHasThemes()) {
+            $themes = iterator_to_array($this->eventThemeRepository->getBy(['idForum' => $event->getId()]));
+            usort($themes, fn($a, $b): int => $a->getPriority() === $b->getPriority() ? $a->getName() <=> $b->getName() : $a->getPriority() <=> $b->getPriority());
+            $themes = array_combine(array_map(fn($theme): ?int => $theme->getId(), $themes), $themes);
+        }
         $now = new \DateTime();
 
         return $this->render(
@@ -34,6 +42,7 @@ public function __invoke(Request $request, $eventSlug): Response
                 'jsonld' => $jsonld,
                 'speakersPagePrefix' => $request->query->get('speakers-page-prefix', '/' . $event->getPath() . '/speakers/'),
                 'display_joindin_links' => $now >= $event->getDateStart() && $now <= \DateTimeImmutable::createFromMutable($event->getDateEnd())->modify('+10 days'),
+                'themes' => $themes,
             ],
         );
     }
diff --git a/sources/AppBundle/Controller/LegacyController.php b/sources/AppBundle/Controller/LegacyController.php
index 69a5b5d08..c5a7b98f8 100644
--- a/sources/AppBundle/Controller/LegacyController.php
+++ b/sources/AppBundle/Controller/LegacyController.php
@@ -12,6 +12,7 @@
 use AppBundle\Event\Invoice\InvoiceService;
 use AppBundle\Event\Model\Repository\EventRepository;
 use AppBundle\Event\Model\Repository\EventStatsRepository;
+use AppBundle\Event\Model\Repository\EventThemeRepository;
 use AppBundle\Event\Model\Repository\InvoiceRepository;
 use AppBundle\Event\Model\Repository\SpeakerRepository;
 use AppBundle\Event\Model\Repository\TalkRepository;
@@ -46,6 +47,7 @@ public function __construct(
         private readonly SpeakerRepository $speakerRepository,
         private readonly TalkRepository $talkRepository,
         private readonly array $backOfficePages,
+        private readonly EventThemeRepository $eventThemeRepository,
     ) {}
 
     public function void()
diff --git a/sources/AppBundle/Controller/Website/Global/HomeAction.php b/sources/AppBundle/Controller/Website/Global/HomeAction.php
index 9d56e9b73..072b819cc 100644
--- a/sources/AppBundle/Controller/Website/Global/HomeAction.php
+++ b/sources/AppBundle/Controller/Website/Global/HomeAction.php
@@ -31,7 +31,7 @@ public function __construct(
         private readonly CacheItemPoolInterface $cache,
         private readonly SearchClient $client,
         private readonly TalkRepository $talkRepository,
-        #[Autowire('%home_algolia_enabled%')]
+        #[Autowire(env: 'HOME_ALGOLIA_ENABLED')]
         private readonly bool $homeAlgoliaEnabled,
     ) {}
 
diff --git a/sources/AppBundle/Controller/Website/Meetups/ListAction.php b/sources/AppBundle/Controller/Website/Meetups/ListAction.php
index f8aebbb1c..fce923971 100644
--- a/sources/AppBundle/Controller/Website/Meetups/ListAction.php
+++ b/sources/AppBundle/Controller/Website/Meetups/ListAction.php
@@ -14,9 +14,9 @@ final class ListAction extends AbstractController
 {
     public function __construct(
         private readonly ViewRenderer $view,
-        #[Autowire('%algolia_app_id%')]
+        #[Autowire(env: 'ALGOLIA_APP_ID')]
         private readonly string $algoliaAppId,
-        #[Autowire('%algolia_frontend_api_key%')]
+        #[Autowire(env: 'ALGOLIA_FRONTEND_API_KEY')]
         private readonly string $algoliaFrontendApikey,
     ) {}
 
diff --git a/sources/AppBundle/Controller/Website/NewsletterController.php b/sources/AppBundle/Controller/Website/NewsletterController.php
index f5b974c99..7dcd087d5 100644
--- a/sources/AppBundle/Controller/Website/NewsletterController.php
+++ b/sources/AppBundle/Controller/Website/NewsletterController.php
@@ -19,7 +19,7 @@ public function __construct(
         private readonly ViewRenderer $view,
         #[Autowire('@app.mailchimp_api')]
         private readonly Mailchimp $mailchimp,
-        #[Autowire('%mailchimp_subscribers_list%')]
+        #[Autowire(env: 'MAILCHIMP_SUBSCRIBERS_LIST')]
         private readonly string $mailchimpSubscribersList,
     ) {}
 
diff --git a/sources/AppBundle/Controller/Website/Static/SuperAperoAction.php b/sources/AppBundle/Controller/Website/Static/SuperAperoAction.php
index 0d30b18f1..5466fe131 100644
--- a/sources/AppBundle/Controller/Website/Static/SuperAperoAction.php
+++ b/sources/AppBundle/Controller/Website/Static/SuperAperoAction.php
@@ -12,7 +12,7 @@
 {
     public function __construct(
         private ViewRenderer $view,
-        #[Autowire('%super_apero_csv_url%')]
+        #[Autowire(env: 'SUPER_APERO_CSV_URL')]
         private string $superAperoCsvUrl,
     ) {}
 
diff --git a/sources/AppBundle/Controller/Website/Talks/ListAction.php b/sources/AppBundle/Controller/Website/Talks/ListAction.php
index 26c0fab77..868c6d112 100644
--- a/sources/AppBundle/Controller/Website/Talks/ListAction.php
+++ b/sources/AppBundle/Controller/Website/Talks/ListAction.php
@@ -16,9 +16,9 @@ final class ListAction extends AbstractController
 {
     public function __construct(
         private readonly ViewRenderer $view,
-        #[Autowire('%algolia_app_id%')]
+        #[Autowire(env: 'ALGOLIA_APP_ID')]
         private readonly string $algoliaAppId,
-        #[Autowire('%algolia_frontend_api_key%')]
+        #[Autowire(env: 'ALGOLIA_FRONTEND_API_KEY')]
         private readonly string $algoliaFrontendApikey,
     ) {}
 
diff --git a/sources/AppBundle/Controller/Website/Techletter/WebhookAction.php b/sources/AppBundle/Controller/Website/Techletter/WebhookAction.php
index 9da349ed4..f322ef6ba 100644
--- a/sources/AppBundle/Controller/Website/Techletter/WebhookAction.php
+++ b/sources/AppBundle/Controller/Website/Techletter/WebhookAction.php
@@ -13,7 +13,7 @@
 {
     public function __construct(
         private TechletterUnsubscriptionsRepository $techletterUnsubscriptionsRepository,
-        #[Autowire('%mailchimp_techletter_webhook_key%')]
+        #[Autowire(env: 'MAILCHIMP_TECHLETTER_WEBHOOK_KEY')]
         private string $mailchimpTechletterWebhookKey,
     ) {}
 
diff --git a/sources/AppBundle/Controller/Website/TechnoWatch/CalendarAction.php b/sources/AppBundle/Controller/Website/TechnoWatch/CalendarAction.php
index 2b39955a6..08bf45005 100644
--- a/sources/AppBundle/Controller/Website/TechnoWatch/CalendarAction.php
+++ b/sources/AppBundle/Controller/Website/TechnoWatch/CalendarAction.php
@@ -13,9 +13,9 @@
 final class CalendarAction extends AbstractController
 {
     public function __construct(
-        #[Autowire('%techno_watch_calendar_key%')]
+        #[Autowire(env: 'TECHNO_WATCH_CALENDAR_KEY')]
         private readonly string $technoWatchCalendarKey,
-        #[Autowire('%techno_watch_calendar_url%')]
+        #[Autowire(env: 'TECHNO_WATCH_CALENDAR_URL')]
         private readonly string $technoWatchCalendarUrl,
     ) {}
 
diff --git a/sources/AppBundle/Event/Form/EventThemeType.php b/sources/AppBundle/Event/Form/EventThemeType.php
new file mode 100644
index 000000000..69a8c9a33
--- /dev/null
+++ b/sources/AppBundle/Event/Form/EventThemeType.php
@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace AppBundle\Event\Form;
+
+use AppBundle\Event\Form\Support\EventHelper;
+use AppBundle\Event\Model\Event;
+use AppBundle\Event\Model\EventTheme;
+use AppBundle\Event\Model\Repository\EventRepository;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\CallbackTransformer;
+use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
+use Symfony\Component\Form\Extension\Core\Type\TextareaType;
+use Symfony\Component\Form\Extension\Core\Type\TextType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\Component\Validator\Constraints as Assert;
+
+class EventThemeType extends AbstractType
+{
+    private readonly EventHelper $eventHelper;
+
+    public function __construct(private readonly EventRepository $eventRepository)
+    {
+        $this->eventHelper = new EventHelper();
+    }
+    public function buildForm(FormBuilderInterface $builder, array $options): void
+    {
+        $idForumField = $builder->create('idForum', ChoiceType::class, [
+            'label' => 'Évènement',
+            'choice_label' => 'title',
+            'choice_value' => fn(?Event $event): ?string => $event?->getId() !== null ? (string) $event->getId() : null,
+            'choices' => $this->eventHelper->sortEventsByStartDate(
+                iterator_to_array($this->eventRepository->getAllActive()),
+            ),
+            'group_by' => fn(Event $choice): string => $this->eventHelper->groupByYear($choice),
+        ]);
+
+        $idForumField->addModelTransformer(new CallbackTransformer(
+            fn(?int $idForum): ?Event => $idForum ? $this->eventRepository->getOneBy(['id' => $idForum]) : null,
+            fn(?Event $event): ?int => $event?->getId(),
+        ));
+        $builder->add($idForumField)
+            ->add('name', TextType::class, [
+                'label' => 'Nom du thème',
+                'constraints' => [new Assert\NotBlank(['message' => 'Titre du forum manquant'])],
+            ])
+            ->add('description', TextareaType::class, [
+                'label' => 'Description',
+                'help' => 'Le thème de description apparait sur la page de programme',
+                'constraints' => [new Assert\NotBlank(), new Assert\Length(['max' => 600])],
+                'attr' => ['class' => 'simplemde'],
+            ])
+        ;
+    }
+
+    public function configureOptions(OptionsResolver $resolver): void
+    {
+        $resolver->setDefaults([
+            'data_class' => EventTheme::class,
+        ]);
+    }
+}
diff --git a/sources/AppBundle/Event/Form/EventType.php b/sources/AppBundle/Event/Form/EventType.php
index 46877969c..996b0c662 100644
--- a/sources/AppBundle/Event/Form/EventType.php
+++ b/sources/AppBundle/Event/Form/EventType.php
@@ -114,6 +114,10 @@ public function buildForm(FormBuilderInterface $builder, array $options): void
                 'label' => 'Date annonce planning',
                 'required' => false,
             ])
+            ->add('hasThemes', CheckboxType::class, [
+                'label' => 'Activer le support des thèmes',
+                'required' => false,
+            ])
             ->add('dateEndSalesSponsorToken', DateTimeType::class, [
                 'widget' => 'single_text',
                 'label' => 'Date fin saisie token sponsor',
diff --git a/sources/AppBundle/Event/Model/Event.php b/sources/AppBundle/Event/Model/Event.php
index e68f93b25..136208b05 100644
--- a/sources/AppBundle/Event/Model/Event.php
+++ b/sources/AppBundle/Event/Model/Event.php
@@ -98,6 +98,8 @@ class Event implements NotifyPropertyInterface
 
     private ?DateTime $archivedAt = null;
 
+    private ?bool $hasThemes = false;
+
     /**
      * @return int
      */
@@ -709,6 +711,19 @@ public function isOnline(): bool
         return str_contains($this->getPath(), 'enligne');
     }
 
+    public function getHasThemes(): bool
+    {
+        return $this->hasThemes;
+    }
+
+    public function setHasThemes(bool $hasThemes): self
+    {
+        $this->propertyChanged('hasThemes', $this->hasThemes, $hasThemes);
+        $this->hasThemes = $hasThemes;
+
+        return $this;
+    }
+
     public static function getInscriptionAttachmentDir(): string
     {
         return __DIR__ . '/../../../../htdocs/uploads/mail_inscription_attachment/';
diff --git a/sources/AppBundle/Event/Model/EventTheme.php b/sources/AppBundle/Event/Model/EventTheme.php
new file mode 100644
index 000000000..264854436
--- /dev/null
+++ b/sources/AppBundle/Event/Model/EventTheme.php
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+namespace AppBundle\Event\Model;
+
+use AppBundle\Event\Model\Repository\EventThemeRepository;
+use CCMBenchmark\Ting\Entity\NotifyProperty;
+use CCMBenchmark\Ting\Entity\NotifyPropertyInterface;
+use CCMBenchmark\TingBundle\Schema\Column;
+use CCMBenchmark\TingBundle\Schema\Table;
+
+#[Table(name: 'afup_conference_theme', connection: 'main', database: '%env(DATABASE_NAME)%', repository: EventThemeRepository::class)]
+class EventTheme implements NotifyPropertyInterface
+{
+    use NotifyProperty;
+    #[Column(autoIncrement: true, primary: true)]
+    private ?int $id = null;
+
+    #[Column]
+    private ?int $idForum = null;
+
+    #[Column]
+    private string $name;
+
+    #[Column]
+    private string $description;
+
+    #[Column]
+    private int $priority = 0;
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function setId(?int $id): void
+    {
+        $this->propertyChanged('id', $this->id ?? null, $id);
+        $this->id = $id;
+    }
+
+    public function getIdForum(): ?int
+    {
+        return $this->idForum;
+    }
+
+    public function setIdForum(?int $idForum): void
+    {
+        $this->propertyChanged('idForum', $this->idForum ?? null, $idForum);
+        $this->idForum = $idForum;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function setName(string $name): void
+    {
+        $this->propertyChanged('name', $this->name ?? '', $name);
+        $this->name = $name;
+    }
+
+    public function getDescription(): string
+    {
+        return $this->description;
+    }
+
+    public function setDescription(string $description): void
+    {
+        $this->propertyChanged('description', $this->description ?? '', $description);
+        $this->description = $description;
+    }
+
+    public function getPriority(): int
+    {
+        return $this->priority;
+    }
+
+    public function setPriority(int $priority): void
+    {
+        $this->propertyChanged('priority', $this->priority ?? 0, $priority);
+        $this->priority = $priority;
+    }
+}
diff --git a/sources/AppBundle/Event/Model/Repository/EventRepository.php b/sources/AppBundle/Event/Model/Repository/EventRepository.php
index 74c479dab..e745f87c3 100644
--- a/sources/AppBundle/Event/Model/Repository/EventRepository.php
+++ b/sources/AppBundle/Event/Model/Repository/EventRepository.php
@@ -8,10 +8,12 @@
 use AppBundle\Event\Model\GithubUser;
 use AppBundle\Event\Model\Ticket;
 use AppBundle\Ting\DateTimeWithTimeZoneSerializer;
+use Aura\SqlQuery\Mysql\Select;
 use CCMBenchmark\Ting\Driver\Mysqli\Serializer\Boolean;
 use CCMBenchmark\Ting\Exception;
 use CCMBenchmark\Ting\Query\QueryException;
 use CCMBenchmark\Ting\Repository\CollectionInterface;
+use CCMBenchmark\Ting\Repository\Hydrator;
 use CCMBenchmark\Ting\Repository\HydratorArray;
 use CCMBenchmark\Ting\Repository\HydratorSingleObject;
 use CCMBenchmark\Ting\Repository\Metadata;
@@ -260,6 +262,24 @@ public function getAllActive(): CollectionInterface
         return $query->query($this->getCollection(new HydratorSingleObject()));
     }
 
+    public function getBySlugWithThemes(string $slug): ?Event
+    {
+        /**
+         * @var Select $queryBuilder
+         */
+        $queryBuilder = $this->getQueryBuilder(Select::class);
+        $queryBuilder
+            ->cols(['*'])
+            ->from('afup_forum')
+            ->leftJoin('afup_conference_theme', 'afup_conference_themes.id_forum', 'afup_forum.id')
+            ->where('path = :path')
+            ->orderBy('afup_conference_theme.name')
+        ;
+        $query = $this->getPreparedQuery($queryBuilder->getStatement());
+        $query->setParams(['path' => $slug]);
+        return $query->query($this->getCollection(new Hydrator()))->first();
+    }
+
     public static function initMetadata(SerializerFactoryInterface $serializerFactory, array $options = [])
     {
         $metadata = new Metadata($serializerFactory);
@@ -267,6 +287,7 @@ public static function initMetadata(SerializerFactoryInterface $serializerFactor
         $metadata->setConnectionName('main');
         $metadata->setDatabase($options['database']);
         $metadata->setTable('afup_forum');
+        $metadata->setRepository(self::class);
 
         $metadata
             ->addField([
@@ -466,6 +487,12 @@ public static function initMetadata(SerializerFactoryInterface $serializerFactor
                 'fieldName' => 'archivedAt',
                 'type' => 'datetime',
             ])
+            ->addField([
+                'columnName' => 'has_themes',
+                'fieldName' => 'hasThemes',
+                'type' => 'bool',
+                'serializer' => Boolean::class,
+            ])
         ;
 
         return $metadata;
diff --git a/sources/AppBundle/Event/Model/Repository/EventThemeRepository.php b/sources/AppBundle/Event/Model/Repository/EventThemeRepository.php
new file mode 100644
index 000000000..955de1172
--- /dev/null
+++ b/sources/AppBundle/Event/Model/Repository/EventThemeRepository.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace AppBundle\Event\Model\Repository;
+
+use AppBundle\Event\Model\EventTheme;
+use CCMBenchmark\Ting\Repository\Repository;
+use CCMBenchmark\Ting\Repository\CollectionInterface;
+
+/**
+ * @extends Repository<EventTheme>
+ */
+class EventThemeRepository extends Repository
+{
+    /**
+     * @return CollectionInterface<EventTheme>
+     */
+    public function getByEventOrderedByPriority(int $eventId): CollectionInterface
+    {
+        return $this->getBy(['idForum' => $eventId], ['priority' => 'ASC', 'name' => 'ASC']);
+    }
+}
diff --git a/sources/AppBundle/Event/Model/Repository/TalkRepository.php b/sources/AppBundle/Event/Model/Repository/TalkRepository.php
index 0678a4e2b..cd33a09f5 100644
--- a/sources/AppBundle/Event/Model/Repository/TalkRepository.php
+++ b/sources/AppBundle/Event/Model/Repository/TalkRepository.php
@@ -225,33 +225,40 @@ public function getByTalkWithSpeakers(Talk $talk)
 
     /**
      * @param bool $applyPublicationdateFilters
+     * @param bool $orderByTheme
      *
      * @return array<TalkAggregate>
      * @throws QueryException
      */
-    public function getByEventWithSpeakers(Event $event, $applyPublicationdateFilters = true): array
+    public function getByEventWithSpeakers(Event $event, bool $applyPublicationdateFilters = true, bool $orderByTheme = false, ?int $filterByThemeId = null): array
     {
-        return $this->getByEventsWithSpeakers([$event], $applyPublicationdateFilters);
+        return $this->getByEventsWithSpeakers([$event], $applyPublicationdateFilters, $orderByTheme, $filterByThemeId);
     }
 
     /**
      * @param list<Event> $events
      * @param bool $applyPublicationdateFilters
+     * @param bool $orderByTheme
      *
      * @return array<TalkAggregate>
      * @throws QueryException
      */
-    public function getByEventsWithSpeakers(array $events, $applyPublicationdateFilters = true): array
+    public function getByEventsWithSpeakers(array $events, bool $applyPublicationdateFilters = true, bool $orderByTheme = false, ?int $filterByThemeId = null): array
     {
         $hydrator = new JoinHydrator();
         $hydrator->aggregateOn('talk', 'speaker', 'getId');
 
+
+        $params = [];
         $publicationdateFilters = '';
         if ($applyPublicationdateFilters) {
             $publicationdateFilters = 'AND (talk.date_publication < NOW() OR talk.date_publication IS NULL)';
         }
-
-        $params = [];
+        $themeFilters = '';
+        if ($filterByThemeId) {
+            $themeFilters = 'AND afup_conference_theme.id = :filterByThemeId';
+            $params['filterByThemeId'] = $filterByThemeId;
+        }
 
         $inEventsKeys = [];
         $cpt = 0;
@@ -266,7 +273,7 @@ public function getByEventsWithSpeakers(array $events, $applyPublicationdateFilt
 
         $query = $this->getPreparedQuery(
             sprintf('SELECT talk.id_forum, talk.session_id, titre, skill, genre, abstract, talk.plannifie, talk.language_code,
-            talk.joindin,
+            talk.joindin, talk.theme,
             speaker.conferencier_id, speaker.nom, speaker.prenom, speaker.id_forum, speaker.photo, speaker.societe,
             planning.debut, planning.fin, room.id, room.nom
             FROM afup_sessions AS talk
@@ -274,8 +281,9 @@ public function getByEventsWithSpeakers(array $events, $applyPublicationdateFilt
             LEFT JOIN afup_conferenciers speaker ON speaker.conferencier_id = acs.conferencier_id
             LEFT JOIN afup_forum_planning planning ON planning.id_session = talk.session_id
             LEFT JOIN afup_forum_salle room ON planning.id_salle = room.id
-            WHERE talk.id_forum IN(%s) AND plannifie = 1 %s
-            ORDER BY planning.debut ASC, room.id ASC, talk.date_publication DESC, talk.session_id ASC ', $inEvents, $publicationdateFilters),
+            LEFT JOIN afup_conference_theme ON afup_conference_theme.id = talk.theme
+            WHERE talk.id_forum IN(%s) AND plannifie = 1 %s %s
+            ORDER BY %s ', $inEvents, $publicationdateFilters, $themeFilters, $orderByTheme ? 'afup_conference_theme.priority ASC, afup_conference_theme.name ASC' : 'planning.debut ASC, room.id ASC, talk.date_publication DESC, talk.session_id ASC '),
         )->setParams($params);
 
         $result = $query->query($this->getCollection($hydrator));
@@ -360,6 +368,20 @@ public function findList(array $talkIds): CollectionInterface
             ->query($this->getCollection(new HydratorSingleObject()));
     }
 
+    /**
+     * @return CollectionInterface<Talk>
+     */
+    public function getScheduledTalksByEvent(int $eventId): CollectionInterface
+    {
+        $query = $this->getPreparedQuery(
+            'SELECT * FROM afup_sessions 
+            WHERE id_forum = :eventId AND plannifie = 1 
+            ORDER BY titre ASC',
+        )->setParams(['eventId' => $eventId]);
+
+        return $query->query($this->getCollection(new HydratorSingleObject()));
+    }
+
     /**
      * @return Metadata
      */
@@ -513,7 +535,13 @@ public static function initMetadata(SerializerFactoryInterface $serializerFactor
                 'fieldName' => 'hasAllowedToSharingWithLocalOffices',
                 'type' => 'bool',
                 'serializer' => Boolean::class,
-            ]);
+            ])
+            ->addField([
+                'columnName' => 'theme',
+                'fieldName' => 'theme',
+                'type' => 'int',
+            ])
+        ;
 
         return $metadata;
     }
diff --git a/sources/AppBundle/Event/Model/Talk.php b/sources/AppBundle/Event/Model/Talk.php
index f0eb08676..fe21e9194 100644
--- a/sources/AppBundle/Event/Model/Talk.php
+++ b/sources/AppBundle/Event/Model/Talk.php
@@ -96,6 +96,8 @@ class Talk implements NotifyPropertyInterface
      */
     private array $votes = [];
 
+    private ?int $theme = null;
+
     public function getId(): ?int
     {
         return $this->id;
@@ -605,4 +607,15 @@ public function setVotes(array $votes): self
         $this->votes = $votes;
         return $this;
     }
+
+    public function getTheme(): ?int
+    {
+        return $this->theme;
+    }
+
+    public function setTheme(?int $theme): void
+    {
+        $this->propertyChanged('theme', $this->theme, $theme);
+        $this->theme = $theme;
+    }
 }
diff --git a/sources/AppBundle/Mailchimp/Runner.php b/sources/AppBundle/Mailchimp/Runner.php
index 047793efa..ca7aa8356 100644
--- a/sources/AppBundle/Mailchimp/Runner.php
+++ b/sources/AppBundle/Mailchimp/Runner.php
@@ -14,7 +14,7 @@ public function __construct(
         #[Autowire('@app.mailchimp_api')]
         private Mailchimp $mailchimp,
         private UserRepository $userRepository,
-        #[Autowire('%mailchimp_members_list%')]
+        #[Autowire(env: 'MAILCHIMP_MEMBERS_LIST')]
         private string $membersListId,
     ) {}
 
diff --git a/sources/AppBundle/Notifier/SlackNotifier.php b/sources/AppBundle/Notifier/SlackNotifier.php
index 4b7ae98a6..838495285 100644
--- a/sources/AppBundle/Notifier/SlackNotifier.php
+++ b/sources/AppBundle/Notifier/SlackNotifier.php
@@ -16,7 +16,7 @@
 final readonly class SlackNotifier
 {
     public function __construct(
-        #[Autowire('%slack_url%')]
+        #[Autowire(env: 'SLACK_URL')]
         private string $postUrl,
         private MessageFactory $messageFactory,
         #[Autowire('@jms_serializer.serializer')]
diff --git a/sources/AppBundle/Slack/UsersClient.php b/sources/AppBundle/Slack/UsersClient.php
index 7b8014352..e9f42453a 100644
--- a/sources/AppBundle/Slack/UsersClient.php
+++ b/sources/AppBundle/Slack/UsersClient.php
@@ -12,9 +12,9 @@
     public const USER_LIST_API = '/users.list';
 
     public function __construct(
-        #[Autowire('%slack_membre_token%')]
+        #[Autowire(env: 'SLACK_MEMBRE_TOKEN')]
         private string $token,
-        #[Autowire('%slack_api_url%')]
+        #[Autowire(env: 'SLACK_API_URL')]
         private string $apiBaseUrl,
     ) {}
 
diff --git a/sources/AppBundle/Twig/TwigExtension.php b/sources/AppBundle/Twig/TwigExtension.php
index d6253f9ea..75086e281 100644
--- a/sources/AppBundle/Twig/TwigExtension.php
+++ b/sources/AppBundle/Twig/TwigExtension.php
@@ -16,9 +16,9 @@ class TwigExtension extends AbstractExtension implements GlobalsInterface
     public function __construct(
         private readonly Parsedown $parsedown,
         private readonly Parsedown $emailParsedown,
-        #[Autowire('%google_analytics_enabled%')]
+        #[Autowire(env: 'GOOGLE_ANALYTICS_ENABLED')]
         private readonly string $googleAnalyticsEnabled,
-        #[Autowire('%google_analytics_id%')]
+        #[Autowire(env: 'GOOGLE_ANALYTICS_ID')]
         private readonly string $googleAnalyticsId,
     ) {}
 
diff --git a/templates/admin/event/form.html.twig b/templates/admin/event/form.html.twig
index d168b87c8..f4b6963fe 100644
--- a/templates/admin/event/form.html.twig
+++ b/templates/admin/event/form.html.twig
@@ -63,6 +63,7 @@
             {{ form_row(form.dateEndVote) }}
             <div class="ui clearing divider"></div>
             {{ form_row(form.datePlanningAnnouncement) }}
+            {{ form_row(form.hasThemes) }}
         </div>
     </div>
 
diff --git a/templates/admin/event/theme_add_edit.html.twig b/templates/admin/event/theme_add_edit.html.twig
new file mode 100644
index 000000000..1b11770a2
--- /dev/null
+++ b/templates/admin/event/theme_add_edit.html.twig
@@ -0,0 +1,97 @@
+{% form_theme form 'form_theme_admin.html.twig' %}
+
+{% extends 'admin/base_with_header.html.twig' %}
+
+{% block content %}
+    <h2>{% if new %}Ajouter{% else %}Modifier{% endif%} un thème</h2>
+
+
+        {{ form_start(form, {'attr': {novalidate: true}}) }}
+        {{ form_errors(form) }}
+    <div class="ui segment">
+        <h2 class="ui header">Thème</h2>
+        <div class="ui clearing divider"></div>
+
+        <div class="ui form">
+            {{ form_row(form.idForum) }}
+            {{ form_row(form.name) }}
+
+
+            <div class="inline fields ui grid">
+                {{ form_label(form.description) }}
+                <div class="field">
+                    {{ form_widget(form.description) }}
+                    {{ form_errors(form.description) }}
+                </div>
+            </div>
+        </div>
+        <div class="inline fields ui grid">
+            <label class="three wide column">
+            </label>
+            <div class="seven wide column">
+                <input name="soumettre" value="Soumettre" type="submit" class="ui primary button">
+            </div>
+        </div>
+    </div>
+
+    <div class="ui form">
+    </div>
+
+    {% if talks|length > 0 %}
+        <div class="ui segment">
+            <details>
+            <summary style="font-size:1.71428571rem; font-weight: bold">Suggestion de prompt pour générer la description
+                    <button id="prompt-button" class="ui button">Copier</button>
+            </summary>
+            <pre style="white-space: pre-wrap" id="prompt-suggestion">
+## Prompt
+Tu es un assistant expert en webmarketing chargé de rédiger une courte description promotionnelle pour une thématique de talks lors du prochain événement de l'AFUP.
+En entrée, tu recevras une liste de talks portant sur une même thématique ainsi que des informations sur les speakers.
+Ton objectif : rédiger un texte accrocheur et fluide qui donne envie d'assister aux talks, tout en mettant en valeur les enjeux et les mots-clés de la thématique (SEO-friendly, sans excès).
+Contraintes :
+– Texte dynamique, sans répétitions, ni énumérations
+– Majuscules uniquement là où elles sont grammaticalement nécessaires
+– Pas de ponctuation ou de mise en forme inutile (pas de tirets quadratins ni d’émojis, sauf si justifiés)
+– 600 caractères maximum
+
+Ne fournis que la description, sans commentaire ni mise en contexte.
+
+## Thématique
+{{ eventTheme.name }}
+
+## Talks
+{% for talk in talks %}
+### Titre: {{ talk.talk.title }}
+{% for speaker in talk.speakers %}
+{% if speaker is not null %}
+### Speaker: {{ speaker.label }}
+{% endif ~%}
+{% endfor ~%}
+### Description du talk
+{{ talk.talk.description }}
+
+{% endfor ~%}
+            </pre>
+
+            </details>
+        </div>
+    {% endif %}
+
+    <div class="ui segment">
+        <p><span class="obligatoire">*</span> indique un champ obligatoire</p>
+    </div>
+    {{ form_end(form) }}
+<script>
+    const promptButton = document.getElementById('prompt-button')
+    promptButton.addEventListener('click', function (event) {
+        event.preventDefault();
+        navigator.clipboard.writeText(document.getElementById('prompt-suggestion').textContent);
+        promptButton.textContent = 'Copié ✔';
+        promptButton.classList.add('positive');
+        setTimeout(function () {
+            promptButton.textContent = 'Copier';
+            promptButton.classList.remove('positive');
+        }, 2000);
+    })
+</script>
+{% endblock %}
\ No newline at end of file
diff --git a/templates/admin/event/theme_list.html.twig b/templates/admin/event/theme_list.html.twig
new file mode 100644
index 000000000..6187a11d5
--- /dev/null
+++ b/templates/admin/event/theme_list.html.twig
@@ -0,0 +1,229 @@
+{% extends 'admin/base_with_header.html.twig' %}
+
+{% block content %}
+    {% set token_delete=csrf_token('forum_delete') %}
+    <h2>Liste des thèmes</h2>
+
+    {% include 'admin/event/change_event.html.twig' with {form: event_select_form} only %}
+    <div class="ui menu">
+        <a href="{{ path('admin_event_themes_add', {'idForum': event.id}) }}" class="item">
+            <div data-tooltip="Ajouter un thème" data-position="bottom left">
+                <i class="icon plus square"></i>
+                Ajouter
+            </div>
+        </a>
+        <div class="item">
+            <button id="save-priorities" class="ui green button">
+                <i class="save icon"></i>
+                Sauvegarder les positions
+            </button>
+        </div>
+    </div>
+
+    <h3>Gestion des thèmes et de leurs positions</h3>
+    <table class="ui table striped celled">
+        <thead>
+        <tr>
+            <th>Nom</th>
+            <th>Position</th>
+            <th>Actions</th>
+        </tr>
+        </thead>
+        <tbody>
+        {% for theme in themes %}
+            <tr data-theme-id="{{ theme.id }}">
+                <td>{{ theme.name }}</td>
+                <td>
+                    <input type="number" 
+                           class="priority-input" 
+                           value="{{ theme.priority }}" 
+                           min="0" 
+                           step="1"
+                           data-theme-id="{{ theme.id }}"
+                           style="width: 80px;">
+                </td>
+                <td style="text-align: right" nowrap="nowrap">
+                    <a href="{{ path('admin_event_themes_edit', {'id': theme.id}) }}"
+                       data-tooltip="Modifier le thème {{ theme.name|e('html') }}"
+                       data-position="left center"
+                       class="compact ui icon button"
+                    >
+                        <i class="pencil alternate icon"></i>
+                    </a>
+                    <form action="{{ path('admin_event_themes_list', {'id': theme.id}) }}" method="post" class="inline-form" style="display: inline-block;" onsubmit="return confirm('Voulez-vous vraiment supprimer ce thème ?')">
+                        <input type="hidden" name="theme_id" value="{{ theme.id }}" />
+                        <input type="submit" name="delete" value="Supprimer"
+                               class="compact ui red button"
+                        />
+                    </form>
+                </td>
+            </tr>
+        {% else %}
+            <tr>
+                <td colspan="3" style="text-align: center;">
+                    <div class="ui icon header">
+                        <i class="meh outline icon"></i>
+                        Aucun thème. {% if event == null %}Essayez de changer d'évènement !{% endif %}
+                    </div>
+                </td>
+            </tr>
+        {% endfor %}
+        </tbody>
+    </table>
+
+    <h3>Association des conférences aux thèmes <span id="theme-success-message" class="ui green label" style="display: none;"><i class="check icon"></i>Sauvegardé</span></h3>
+    <div id="talks-section">
+        {% if scheduled_talks %}
+            <table class="ui table striped celled form">
+                <thead>
+                <tr>
+                    <th style="width: 20%;">Conférence</th>
+                    <th style="width: 70%;">Résumé</th>
+                    <th style="">Thème</th>
+                </tr>
+                </thead>
+                <tbody>
+                {% for talk in scheduled_talks %}
+                    <tr data-talk-id="{{ talk.id }}">
+                        <td>
+                            <strong>{{ talk.title }}</strong>
+                        </td>
+                        <td>
+                            {% set abstract = talk.abstract %}
+                            {% if abstract|length > 400 %}
+                                <div class="abstract-content">
+                                    <span class="abstract-short">{{ abstract|slice(0, 400) }}...</span>
+                                    <span class="abstract-full" style="display: none;">{{ abstract|raw|markdown }}</span>
+                                    <br>
+                                    <a href="#" class="toggle-abstract">Voir plus</a>
+                                </div>
+                            {% else %}
+                                <div class="abstract-content">
+                                    <span class="abstract-full">{{ abstract|raw|markdown }}</span>
+                                </div>
+                            {% endif %}
+                        </td>
+                        <td>
+                            <div class="inline fields">
+                                <select class="theme-select ui " data-talk-id="{{ talk.id }}">
+                                    <option value="">Aucun thème</option>
+                                    {% for theme in themes %}
+                                        <option value="{{ theme.id }}" 
+                                                {% if talk.theme == theme.id %}selected{% endif %}>
+                                            {{ theme.name }}
+                                        </option>
+                                    {% endfor %}
+                                </select>
+                            </div>
+                        </td>
+                    </tr>
+                {% endfor %}
+                </tbody>
+            </table>
+        {% else %}
+            <div class="ui icon header">
+                <i class="meh outline icon"></i>
+                Aucune conférence planifiée pour cet événement.
+            </div>
+        {% endif %}
+    </div>
+
+    <script>
+    document.addEventListener('DOMContentLoaded', function() {
+        // Wait for jQuery to be available
+        function waitForJQuery(callback) {
+            if (typeof $ !== 'undefined') {
+                callback();
+            } else {
+                setTimeout(function() { waitForJQuery(callback); }, 100);
+            }
+        }
+        
+        waitForJQuery(function() {
+            // Handle theme selection for talks with native selects
+            $('.theme-select').on('change', function() {
+                var talkId = $(this).data('talk-id');
+                var themeId = $(this).val();
+                
+                $.ajax({
+                    url: '{{ path('admin_event_themes_list', {'id': event.id}) }}',
+                    method: 'POST',
+                    data: {
+                        action: 'update_talk_theme',
+                        talk_id: talkId,
+                        theme_id: themeId
+                    },
+                    headers: {
+                        'X-Requested-With': 'XMLHttpRequest'
+                    },
+                    success: function(response) {
+                        if (response.success) {
+                            // Show success message
+                            $('#theme-success-message').show();
+                            setTimeout(function() {
+                                $('#theme-success-message').fadeOut();
+                            }, 2000);
+                        }
+                    },
+                    error: function() {
+                        alert('Erreur lors de la mise à jour du thème');
+                    }
+                });
+            });
+            
+            // Handle priority updates
+            $('#save-priorities').click(function() {
+                var priorities = [];
+                $('.priority-input').each(function() {
+                    priorities.push({
+                        theme_id: $(this).data('theme-id'),
+                        priority: $(this).val()
+                    });
+                });
+                
+                // Send multiple updates
+                var promises = priorities.map(function(item) {
+                    return $.ajax({
+                        url: '{{ path('admin_event_themes_list', {'id': event.id}) }}',
+                        method: 'POST',
+                        data: {
+                            action: 'update_theme_priority',
+                            theme_id: item.theme_id,
+                            priority: item.priority
+                        },
+                        headers: {
+                            'X-Requested-With': 'XMLHttpRequest'
+                        }
+                    });
+                });
+                
+                Promise.all(promises).then(function() {
+                    alert('Positions sauvegardées avec succès');
+                    location.reload();
+                }).catch(function() {
+                    alert('Erreur lors de la sauvegarde');
+                });
+            });
+            
+            // Handle abstract toggle
+            $('.toggle-abstract').click(function(e) {
+                e.preventDefault();
+                var container = $(this).closest('.abstract-content');
+                var shortVersion = container.find('.abstract-short');
+                var fullVersion = container.find('.abstract-full');
+                
+                if (fullVersion.is(':visible')) {
+                    fullVersion.hide();
+                    shortVersion.show();
+                    $(this).text('Voir plus');
+                } else {
+                    shortVersion.hide();
+                    fullVersion.show();
+                    $(this).text('Voir moins');
+                }
+            });
+        });
+    });
+    </script>
+
+{% endblock %}
\ No newline at end of file
diff --git a/templates/blog/program.html.twig b/templates/blog/program.html.twig
index be3c86744..a79c918d3 100644
--- a/templates/blog/program.html.twig
+++ b/templates/blog/program.html.twig
@@ -2,9 +2,30 @@
     {{ jsonld|json_encode|raw }}
 </script>
 
+{% macro theme_header(currentTheme, themes) %}
+    {% if themes is not null and themes[currentTheme] is defined %}
+        <div class="themes" id="theme-{{ currentTheme }}">
+            <ul>
+                <li class="title">Thèmes</li>
+                {% for theme in themes %}
+                <li>
+                    <a href="#theme-{{ theme.id }}" class="{% if currentTheme == theme.id %}current{% endif %}">{{ theme.name }}</a>
+                </li>
+                {% endfor %}
+            </ul>
+        </div>
+        <p class="themes-description">{{ themes[currentTheme].description }}</p>
+    {% endif %}
+{% endmacro %}
+
 {% if talks|length %}
 <div class="sessions">
+    {% set last_theme = null %}
     {% for talk in talks %}
+        {% if themes is not null and talk.talk.theme != last_theme %}
+            {% set last_theme = talk.talk.theme %}
+            {{ _self.theme_header(last_theme, themes) }}
+        {% endif %}
         <div class="session boss geek">
             <a name="{{ talk.talk.id }}"></a>
             <h4>{{ talk.talk.title|raw }}</h4>