diff --git a/docs/.vitepress/de.ts b/docs/.vitepress/de.ts
index 33ddef9..b551e4c 100644
--- a/docs/.vitepress/de.ts
+++ b/docs/.vitepress/de.ts
@@ -162,6 +162,16 @@ function sidebarDevelopers(): DefaultTheme.SidebarItem[] {
           link: "internationalization",
         },
       ],
+    },
+    {
+      text: "Datenpersistenz",
+      collapsed: false,
+      items: [
+        {
+          text: "Datenbank",
+          link: "database",
+        },
+      ],
     }
   ]
 }
diff --git a/docs/.vitepress/en.ts b/docs/.vitepress/en.ts
index e034f61..f903fa0 100644
--- a/docs/.vitepress/en.ts
+++ b/docs/.vitepress/en.ts
@@ -157,6 +157,16 @@ function sidebarDevelopers(): DefaultTheme.SidebarItem[] {
           link: "internationalization",
         },
       ],
+    },
+    {
+      text: "Data Persistence",
+      collapsed: false,
+      items: [
+        {
+          text: "Database",
+          link: "database",
+        },
+      ],
     }
   ]
 }
diff --git a/docs/de/developers/database.md b/docs/de/developers/database.md
new file mode 100644
index 0000000..ba7ac12
--- /dev/null
+++ b/docs/de/developers/database.md
@@ -0,0 +1,10 @@
+# Database
+
+## ER-Diagram
+Das ER-Diagram wurde mit dem Webtool GenMyModel erstellt.
+
+![er-diagram.png](/er-diagram.png)
+
+
+## Umsetzung in Symfony
+Die Datenbank wurde mit Doctrine ORM in Symfony umgesetzt. Die Entitäten wurden mit dem Befehl `php bin/console make:entity` erstellt. Die Entitäten wurden dann mit dem Befehl `php bin/console make:migration` in eine Migration umgewandelt. Die Migration wurde dann mit dem Befehl `php bin/console doctrine:migrations:migrate` in die Datenbank übertragen.
diff --git a/docs/developers/database.md b/docs/developers/database.md
new file mode 100644
index 0000000..06c44bf
--- /dev/null
+++ b/docs/developers/database.md
@@ -0,0 +1,11 @@
+# Database
+
+## ER-Diagram
+The ER diagram was created with the web tool GenMyModel.
+
+![er-diagram.png](/er-diagram.png)
+
+
+## Implementation in Symfony
+The database was implemented with Doctrine ORM in Symfony. The entities were created with the command `php bin/console make:entity`. The entities were then converted into a migration using the command `php bin/console make:migration`. The migration was then transferred to the database using the command `php bin/console doctrine:migrations:migrate`.
+
diff --git a/docs/public/er-diagram.png b/docs/public/er-diagram.png
new file mode 100644
index 0000000..8b67864
Binary files /dev/null and b/docs/public/er-diagram.png differ