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.
Die Gartenlaube . Professor Roentgenbr einer Aufnahme von Hofphotograph Prof Hanfstaengel in Frankfurt am Main DieGartenlaube PDold Wilhelm Conrad Rntgen
Page 2023 Free-images.com. All images are Public Domain