Royal Prussia (polish: Prusy Kr�lewskie) was a Polish province formed from a part of the Teutonic Order Teritory. In March 1440, the Hanseatic cities of Gdansk, Elblag and Torun founded the Prussian Confederation with other Prussian cities to free themselves from the overlordship of the Teutonic Knights. Polish king Casimir IV supported their revolt (February 1454) in the War of the Cities or Thirteen Years' War and the second Treaty of Torun[?] (October 1466). That treaty provided for the Teutonic Order's cession to the Polish crown of its rights over the western half of its territories. Henceforth the Gdansk Pomerania returned to Poland to form Royal Prussia together with Malbork, the Chelmno[?] voivodships and the bishopric of Warmia. The eastern part of the Monastic State of Prussia[?] remained under the rule of the Teutonic Order successors, under Polish suzerainty as a Polish fief. It included the lands recovered by Poland during the Thirteen Years War (1454-1466) and also the bishopric of Warmia and regions of Malbork and Elblag.
Until 1569 ( the Union of Lublin[?]), Royal Prussia enjoyed substantial autonomy in the Kingdom of Poland - it had it's own Diet, treasury and monetary unit. During the First (1772) and Second (1793) Partitions of Poland the teritory of Royal Prussia was incorporated into the Kingdom of Prussia.
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