This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Grundrisse Burgturm Reuschenberg. Grundrisse der Geschosse des Vierecksturm von Burg Teuschenberg Ernst Polaczek Die Kunstdenkmler des Kreises Bergheim Schwann Dsseldorf Ludwig Arntz PDold Burg Reuschenberg
Page 2023 Free-images.com. All images are Public Domain