The Duchy of Greater Poland was a district principality that encompassed much of the historical region of Greater Poland, with a territory roughly corresponding to the present-day Greater Poland Voivodeship in west-central Poland. It emerged in the 12th century following the 1138 testament of Bolesław III Wrymouth, which divided the previously unified Kingdom of Poland into several hereditary duchies, initiating a period of feudal fragmentation.
The Duchy of Greater Poland was a district principality that encompassed much of the historical region of Greater Poland, with a territory roughly corresponding to the present-day Greater Poland Voivodeship in west-central Poland. It emerged in the 12th century following the 1138 testament of Bolesław III Wrymouth, which divided the previously unified Kingdom of Poland into several hereditary duchies, initiating a period of feudal fragmentation.
Source: Wikipedia "Duchy of Greater Poland" · CC BY-SA 4.0
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