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:
Johann Philipp Dieffenbach . Portrait von Johann Philipp Dieffenbach Rektor der Friedberger Augustinerschule und regionaler Altertumsforscher In der verwendeten Quelle angegebener Bildnachweis Friedberg Stadtarchiv Authority control Vera Rupp Heide Birley Wanderungen am Wetteraulimes Theiss Stuttgart ISBN Abb author before PDold