diff --git a/docs/index.md b/docs/index.md
index 09df03b8..525c9048 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -3,3 +3,6 @@ layout: default
 ---
 # Road Core service
 
+## Architecture
+
+1. [Service configuration class hierarchy](service_configuration_classes.md)