diff --git a/backend/src/main.rs b/backend/src/main.rs
index fe8094b..c2519cf 100644
--- a/backend/src/main.rs
+++ b/backend/src/main.rs
@@ -1,5 +1,4 @@
 mod category;
-mod error;
 mod file;
 mod item;
 mod location;
diff --git a/backend/src/router/category.rs b/backend/src/router/category.rs
index 25e0ef3..20fe767 100644
--- a/backend/src/router/category.rs
+++ b/backend/src/router/category.rs
@@ -6,10 +6,9 @@ use axum::{
 use sqlx::PgPool;
 use tracing::instrument;
 
-use crate::{
-    category::{Category, NewCategory},
-    error::HandlerError,
-};
+use crate::category::{Category, NewCategory};
+
+use super::error::HandlerError;
 
 #[instrument]
 pub async fn get_all_categories(
diff --git a/backend/src/error.rs b/backend/src/router/error.rs
similarity index 100%
rename from backend/src/error.rs
rename to backend/src/router/error.rs
diff --git a/backend/src/router/file.rs b/backend/src/router/file.rs
index c88812e..e4fd30c 100644
--- a/backend/src/router/file.rs
+++ b/backend/src/router/file.rs
@@ -7,7 +7,9 @@ use axum::{
 use sqlx::PgPool;
 use tracing::instrument;
 
-use crate::{error::HandlerError, file::FileInfo};
+use crate::file::FileInfo;
+
+use super::error::HandlerError;
 
 #[instrument]
 pub async fn get_file_by_id(
diff --git a/backend/src/router/item.rs b/backend/src/router/item.rs
index 7a2fb3c..3cdb9ee 100644
--- a/backend/src/router/item.rs
+++ b/backend/src/router/item.rs
@@ -6,10 +6,9 @@ use axum::{
 use sqlx::PgPool;
 use tracing::instrument;
 
-use crate::{
-    error::HandlerError,
-    item::{Item, NewItem},
-};
+use crate::item::{Item, NewItem};
+
+use super::error::HandlerError;
 
 #[instrument]
 pub async fn get_all_items(
diff --git a/backend/src/router/location.rs b/backend/src/router/location.rs
index cbd7252..cebf046 100644
--- a/backend/src/router/location.rs
+++ b/backend/src/router/location.rs
@@ -6,10 +6,9 @@ use axum::{
 use sqlx::PgPool;
 use tracing::instrument;
 
-use crate::{
-    error::HandlerError,
-    location::{Location, NewLocation},
-};
+use crate::location::{Location, NewLocation};
+
+use super::error::HandlerError;
 
 #[instrument]
 pub async fn get_all_locations(
diff --git a/backend/src/router/mod.rs b/backend/src/router/mod.rs
index 57d87d7..44fe982 100644
--- a/backend/src/router/mod.rs
+++ b/backend/src/router/mod.rs
@@ -24,6 +24,7 @@ use tracing::info;
 
 mod category;
 mod common;
+mod error;
 mod file;
 mod item;
 mod location;
@@ -52,27 +53,42 @@ async fn profile_endpoint(request: Request, next: Next) -> Response {
 }
 
 pub fn create_router(connection: PgPool, metrics_handler: PrometheusHandle) -> Router {
+    let item_router = Router::new()
+        .route("/items", get(get_all_items))
+        .route("/items/:id", get(get_item_by_id))
+        .route("/items", post(add_item))
+        .route("/items/:id", delete(delete_item_by_id))
+        .route("/items", put(update_item))
+        .with_state(connection.clone());
+
+    let location_router = Router::new()
+        .route("/locations", get(get_all_locations))
+        .route("/locations/:id", get(get_location_by_id))
+        .route("/locations", post(add_location))
+        .route("/locations/:id", delete(delete_location_by_id))
+        .route("/locations", put(update_location))
+        .with_state(connection.clone());
+
+    let category_router = Router::new()
+        .route("/categories", get(get_all_categories))
+        .route("/categories/:id", get(get_category_by_id))
+        .route("/categories", post(add_category))
+        .route("/categories/:id", delete(delete_category_by_id))
+        .route("/categories", put(update_category))
+        .with_state(connection.clone());
+
+    let file_router = Router::new()
+        .route("/files/:id", get(get_file_by_id))
+        .route("/files", post(add_file))
+        .route("/files/:id", delete(delete_file_by_id))
+        .route("/file_infos", get(get_all_files))
+        .with_state(connection);
+
     Router::new()
-        .route("/api/items", get(get_all_items))
-        .route("/api/items/:id", get(get_item_by_id))
-        .route("/api/items", post(add_item))
-        .route("/api/items/:id", delete(delete_item_by_id))
-        .route("/api/items", put(update_item))
-        .route("/api/locations", get(get_all_locations))
-        .route("/api/locations/:id", get(get_location_by_id))
-        .route("/api/locations", post(add_location))
-        .route("/api/locations/:id", delete(delete_location_by_id))
-        .route("/api/locations", put(update_location))
-        .route("/api/categories", get(get_all_categories))
-        .route("/api/categories/:id", get(get_category_by_id))
-        .route("/api/categories", post(add_category))
-        .route("/api/categories/:id", delete(delete_category_by_id))
-        .route("/api/categories", put(update_category))
-        .route("/api/files/:id", get(get_file_by_id))
-        .route("/api/files", post(add_file))
-        .route("/api/files/:id", delete(delete_file_by_id))
-        .route("/api/file_infos", get(get_all_files))
-        .with_state(connection)
+        .nest("/api", item_router)
+        .nest("/api", location_router)
+        .nest("/api", category_router)
+        .nest("/api", file_router)
         .route("/metrics", get(metrics))
         .with_state(metrics_handler)
         .route("/status/health", get(status))