The Treaty of Pyritz settled claims of the House of Pomerania and the House of Hohenzollern regarding the legal status and succession in the Duchy of Pomerania on 26 and 28 March 1493. John Cicero, Elector of Brandenburg of the Hohenzollern renounced the Electorate of Brandenburg's claims to hold the Pomeranian duchy as a fief on 26 March in Pyritz (now Pyrzyce). In turn, Bogislaw X, Duke of Pomerania acknowledged Brandenburgian succession in his duchy in case of the extinction of his dynasty on 28 March in Königsberg (now Kaliningrad). The treaty was the most important achievement of Bogislaw X's foreign policy. It was confirmed and amended when a final settlement between the two houses was reached in the Treaty of Grimnitz in 1529.