A map of the Bishopric of Schwerin (German: Bistum Schwerin) (red) at the time of the Hohenstaufen Emperors (circa 1250).
The highlighted area shows the territories that would later become the Duchy of Mecklenburg (with the exception of Strelitz/Stargard, which were still part of the Margraviate of Brandenburg at this point in history).

Note that while it uses the same scheme as standard location/locator maps, this map technically does not conform to the standard, as it is not in equirectangular projection. Therefore grid lines for latitude and longitude are also included on the sub-map.
File: own workData: Droysens-26.jpg
Alphathon /ˈæɫfə.θɒn/ (talk)