Kingdom 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.

Frederick I (who was prince-elector of Brandenburg and duke of Prussia) crowned himself "King in Prussia" as Frederick I on 18 January 1701. Legally, no kingdoms could exist in the Holy Roman Empire except for Bohemia. However, Frederick took the line that since Prussia had never been part of the empire and the Hohenzollerns were fully sovereign over it, he could elevate Prussia to a kingdom. Prussia ceased to exist as an independent kingdom after the unification of Germany in 1871. However, it continued to exist as Kingdom in the German Empire until 1918 and then as a Free State until the Free State was subordinated to the Reich government and deprived of its independence in 1932. It was formally abolished in 1947.