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:
KniglherzoglPreussen. Prussia from to Coloured blue bright green magenta yellow The voyewoddistricts of Royal Polish Prussia Light gray The Dukedom of Prussia up to state of the Teutonic Order after royal province of the Kingdom of Prussia KniglherzoglPreussen UTC jacurek derivative work KniglherzoglPreussen Prussia from