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.
Zamenhof . Universala Kongreso de Esperanto . Barcelono Hispanio. eo Zamenhof Universala Kongreso de Esperanto Barcelono Hispanio esperanto es author PDold Uploaded with Ludwik Zamenhof World Esperanto Congress
Page 2023 Free-images.com. All images are Public Domain