diff --git a/book/routing.rst b/book/routing.rst
index 2c611da0336..d00ed9c0fff 100644
--- a/book/routing.rst
+++ b/book/routing.rst
@@ -1526,6 +1526,6 @@ should also be used to generate URLs.
 Learn more from the Cookbook
 ----------------------------
 
-* :doc:`/cookbook/routing/scheme`
+* :doc:`/cookbook/routing/index`
 
 .. _`FOSJsRoutingBundle`: https://github.com/FriendsOfSymfony/FOSJsRoutingBundle
diff --git a/cookbook/map.rst.inc b/cookbook/map.rst.inc
index 5ba5d97ff1c..5439da91d2a 100644
--- a/cookbook/map.rst.inc
+++ b/cookbook/map.rst.inc
@@ -150,6 +150,8 @@
   * :doc:`/cookbook/routing/custom_route_loader`
   * :doc:`/cookbook/routing/redirect_trailing_slash`
   * :doc:`/cookbook/routing/extra_information`
+  * :doc:`/cookbook/routing/extending_routing`
+  * :doc:`/cookbook/routing/multiple_routers`
 
 * :doc:`Security Authentication (Identifying/Logging in the User) </cookbook/security/index>`
 
diff --git a/cookbook/routing/extending_routing.rst b/cookbook/routing/extending_routing.rst
new file mode 100644
index 00000000000..5e261bc23a1
--- /dev/null
+++ b/cookbook/routing/extending_routing.rst
@@ -0,0 +1,15 @@
+Extending the Routing System
+============================
+
+The routing system has several extension points:
+
+* You can use the ``@ParamConverter`` mechanism of FrameworkExtraBundle_
+  to convert controller arguments into objects.
+* You can write :doc:`custom route loaders <custom_route_loader>`;
+* You can write your own ``Router`` instance and
+  :doc:`combine several routers <multiple_routers>`;
+* Some bundles overwrite core routing services to alter the route loading
+  process, e.g. JmsI18nRoutingBundle_.
+
+.. _FrameworkExtraBundle: https://symfony.com/doc/current/bundles/SensioFrameworkExtraBundle/annotations/converters.html
+.. _JMSI18nRoutingBundle: https://github.com/schmittjoh/JMSI18nRoutingBundle
diff --git a/cookbook/routing/index.rst b/cookbook/routing/index.rst
index c42cff1748d..965c10924c5 100644
--- a/cookbook/routing/index.rst
+++ b/cookbook/routing/index.rst
@@ -9,6 +9,8 @@ Routing
     redirect_in_config
     method_parameters
     service_container_parameters
-    custom_route_loader
     redirect_trailing_slash
     extra_information
+    extending_routing
+        custom_route_loader
+        multiple_routers
diff --git a/cookbook/routing/multiple_routers.rst b/cookbook/routing/multiple_routers.rst
new file mode 100644
index 00000000000..e6b62ad8366
--- /dev/null
+++ b/cookbook/routing/multiple_routers.rst
@@ -0,0 +1,19 @@
+.. index::
+   single: Routing; Multiple Routers
+
+Using the Symfony CMF ChainRouter to Combine Multiple Routers
+=============================================================
+
+The Symfony CMF ``ChainRouter`` allows to use more than one router. A main
+use case is to keep the :doc:`default symfony routing system </book/routing>`
+available when writing a custom router.
+
+.. caution::
+
+    If you simply need a way to load routes determined in a different
+    way, using :doc:`a custom route loader <custom_route_loader>` is
+    simpler than writing your own controller.
+    Writing a custom controller is justified when the routes can not be
+    statically determined.
+
+TODO: a bit of code examples?