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.
Erfurt Petersberg . de Ansicht der Stadt Erfurt mit der Zitadelle Petersberg um Stadtarchiv Erfurt Werner PDold de City walls of Erfurt Fortifications of Erfurt Maps of fortifications Erfurt in the th century
Page 2023 Free-images.com. All images are Public Domain