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:
Liebknechtjg. Johann Georg Liebknecht als Rektor der Universitt Gieen Fotografie eines Gemldes aus der Professorengalerie der LudwigsUniversitt Gieen der Univ Gieen HR gegen Bearbeitungsgebhr erworben ub unigiessen de pl tshow wertreg SIG wert HR reccheck Signatur HR author Other versions PDold Original upload log de Wdwdbot