The Second Peace of Thorn of 1466 (German: Zweiter Friede von Thorn; Polish: Drugi Pokój Toruński) was a peace treaty signed in the Hanseatic city of Thorn (Toruń) on 9 October 1466 between the Polish king Casimir IV on one side, and the Teutonic Knights on the other.
The treaty concluded the Thirteen Years' War (1454–1466) which had begun in February 1454 with the revolt of the Prussian Confederation, led by the cities of Danzig (Gdańsk), Elbing (Elbląg), Kulm (Chełmno) and Thorn, and the Prussian gentry against the rule of the Teutonic Knights in the Monastic state.
Both sides agreed to seek confirmation from Pope Paul II and Holy Roman Emperor Frederick III, but the Polish side stressed (and the Teutonic side agreed) that this confirmation would not be needed for validation of the treaty. In the treaty, the Teutonic Order ceded the territories of Pomerelia (Eastern Pomerania) with Danzig, Chełmno Land with Kulm and Thorn, the mouth of the Vistula with Elbing and Marienburg (Malbork), and the Bishopric of Warmia (Ermland) with Allenstein (Olsztyn). The Order also acknowledged the rights of the Polish Crown for Prussia's western half, subsequently known as Polish or Royal Prussia.
As a consequence of the treaty, Warmia became an autonomous region ruled by bishop of Warmia (see Duchy of Warmia). Eastern Prussia, later called Duchy of Prussia remained with the Teutonic Order until 1525 and the grandmaster was supposed to swear a personal oath (the Prussian homage) to the king of Poland and to furnish him with military. In order to avoid giving the oath, the new Grand Masters made it simply their practice not to visit Prussia.
The treaty stated that Royal Prussia became the exclusive property of Polish king and Polish kingdom. Later some disagreements arose concerning certain prerogatives that Royal Prussia and the cities held, like Danzig's privileges. While the Polish side considered it simply part of the kingdom, Royal Prussians insisted on and defended their guaranteed autonomy. The government differed from the Polish kingdom, they had privileges such as the minting of its own coins, its own Diet meetings (see the Prussian estates), its own military, and its own administrative usage of the German language. Prussians were denied the right to name bishops in Royal Prussia and decided not to take the seats provided for them in the Sejm. This conflict eventually led to the War of the Priests (1467–79). Eventually, Royal Prussia would become increasingly integrated into the Polish-Lithuanian Commonwealth, but would retain some distinctive features until the partitions of Poland in the late 18th century.
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