diff --git a/README.md b/README.md
index 52f56ae..39e3d07 100644
--- a/README.md
+++ b/README.md
@@ -69,3 +69,10 @@ When names are listed, it might be beneficial to consider them as groups of node
 - [networkx](https://networkx.org/documentation/stable/index.html)
 - [graphology.js](https://graphology.github.io/)
 - [vis.js (Network)](https://visjs.github.io/vis-network/docs/network/)
+
+## Extra
+
+- [Statue of Johann Sebastian Bach at Thomaskirsche in Leipzig, Germany](https://commons.wikimedia.org/wiki/File:Vxla-jsbach-at-thomaskirsche.jpg)
+- [Thomaskirche Interior](https://en.wikipedia.org/wiki/File:Thomaskirche_Interior.jpg)
+- [Schloss Köthen](https://commons.wikimedia.org/wiki/File:SchlossK%C3%B6then4-2012-2.JPG)
+- [Adolph von Menzel: Frederick the Great Playing the Flute at Sanssouci](https://commons.wikimedia.org/wiki/File:Adolph_Menzel_-_Fl%C3%B6tenkonzert_Friedrichs_des_Gro%C3%9Fen_in_Sanssouci_-_Google_Art_Project.jpg)