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:
SternwarteMannheim. de Stich der Mannheimer Sternwarte en Plan of the Mannheim Observatory de Denkschrift des Geheimrats Klueber Scan vom Original von de original upload date Original uploader was Rivi at org de PDold original upload log page de SternwarteMannheim Rivi bytes no der Mannheimer Sternwarte Sternwarte