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.
Keywords from Image Description:
Hammer Purgstall. Joseph von HammerPurgstall Lithographie von Josef Kriehuber Eigenes Foto einer Originallithographie Creator Joseph Kriehuber Foto Peter Geymayer This image is in the public domain due to its age PDold DEFAULTSORT HammerPurgstall Joseph Joseph von HammerPurgstall Austrian Academy of Sciences Lithographs by Josef