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.
Richard von Volkmann. photo of Richard von Volkmann aka Richard Leander German author thcentury author From the German origial source page here before Volkmann's death PDold DEFAULTSORT Volkmann Richard von Richard von Volkmann
Page 2023 Free-images.com. All images are Public Domain