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.
Eyerkeilsturm. Alter Stich Thomas Cranz der Stadtmauer Aachen mit dem Eyerkeilturm in der Bildmitte alte private Bildersammlung Creator Thomas Cranz Thomas Cranz PDold
Page 2023 Free-images.com. All images are Public Domain