diff --git a/README.md b/README.md
index cef59f2..5103d75 100644
--- a/README.md
+++ b/README.md
@@ -14,13 +14,16 @@ High modularity of plugins allows for the composition of ad hoc use cases with m
 
 The suite comes with a set of pre-built plugins and GUIs that communities can easily extend and / or reuse.
 
+## Use Case
+##### GNA context: component diagram
+
+<img src="https://gcube.wiki.gcube-system.org/images_gcube/2/2e/Geoportal-Service_Workflow_and_Interactions_with_Engines.png" style="max-width:800px;" alt="GNA context: engines involved">
 
 ## Documentation
 * [Dedicated Wiki](https://geoportal.d4science.org/geoportal-service/docs/index.html#) - powered by [Sphynx](https://www.sphinx-doc.org/en/master/)
 * [Service Interactive API](https://geoportal.d4science.org/geoportal-service/api-docs/index.html) - powered by [Enunciate](http://enunciate.webcohesion.com/)
 * [Gcube System Wiki](https://gcube.wiki.gcube-system.org/gcube/GeoPortal).
 * [Guide Notebooks](use-cases) -  powered by [Jupyter](https://jupyter.org/) 
-* [Service Wiki src](use-cases/src/site/suite.rst)
 
  
 ## Built with