diff --git a/README.md b/README.md
index d992d147d5..495ab992b8 100644
--- a/README.md
+++ b/README.md
@@ -48,4 +48,10 @@ For more detailed instructions, including **deployment instructions**, see [save
   proxied as configured in [dev-server.js](../save-frontend/webpack.config.d/dev-server.js). User will be hardcoded with `admin` user. 
 
 ## Architecture and design
-<img src="/info/img/save-diagram.png" width="512px"/>
+Save:
+
+<img src="/info/img/save-diagram.png" width="768px"/>
+
+COSV:
+
+<img src="/info/img/cosv-diagram.PNG" width="768px"/>
diff --git a/info/img/cosv-diagram.PNG b/info/img/cosv-diagram.PNG
new file mode 100644
index 0000000000..143b21c37a
Binary files /dev/null and b/info/img/cosv-diagram.PNG differ