he Origin of Kingdom of Prussia 普鲁士王国的建立 When Elector Friedrich ll crowned himself King Friedrich I in Prussia in 1701, the new kingdom ruled by the Hohenzollern dynasty became known as the Kingdom of Prussia After the First Partition of Poland in 1772, part of the former Polish province Roval Prussia, was merged with East Prussia. On January 31, 1773 King Friedrich l announced that the newly annexed lands were to be known as West Prussia and the old duchy of Prussia was to be known as east PrussiaThe Origin of Kingdom of Prussia 普鲁士王国的建立 ◼ When Elector Friedrich III crowned himself King Friedrich I in Prussia in 1701, the new kingdom ruled by the Hohenzollern dynasty became known as the Kingdom of Prussia. ◼ After the First Partition of Poland in 1772, part of the former Polish province Royal Prussia, was merged with East Prussia. On January 31, 1773 King Friedrich II announced that the newly annexed lands were to be known as West Prussia and the old Duchy of Prussia was to be known as East Prussia