Duchy of Prussia: All Data

This page is about the data available for this polity, the chronology of the events of the polity is available here.

Was a duchy established in 1525 in eastern Prussia, after West Prussia had become the Polish province of Royal Prussia, according to the Peace of Toruń (Thorn) of 1466. It remained a vassal state of the Polish-Lithuanian Commonwealth until 1657 when the Hohenzollern prince-electors of the Margraviate of Brandenburg acquired suzerainty over the territory under the Treaty of Wehlau.