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.
Knigsberger Seekanal. schematic drawing of the Knigsberger Seekanal Guttzeit Ostpreuen Bilder Wrzburg author PDold Canals in Russia Bodies of water in Kaliningrad Oblast Transport in East Prussia
Page 2023 Free-images.com. All images are Public Domain