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:
Frankfurt Am MainKnigspfalz FrankfurtBefunde und Zustandum Ravenstein. en Frankfurt on the Main Archaeological features and partial reconstruction of the Knigspfalz Frankfurt Royal Palace Frankfurt projected upon city map of de Frankfurt am Main Archologische Befunde zur und Teilrekonstruktion der Knigspfalz Frankfurt projiziert