After the 1657 Treaty of Bydgoszcz (Bromberg) that amended the previous Treaty of Wehlau it was granted as a fief to the Hohenzollern dynasty of Brandenburg-Prussia in return for her help against Sweden in the Swedish-Polish War under the same favourable conditions the Griffins had enjoyed before.
This followed the 1657 Treaty of Bydgoszcz (Bromberg), which updated the earlier Treaty of Wehlau, and was bestowed as a vassalage upon the Hohenzollern dynasty of Brandenburg-Prussia in exchange for their aid against Sweden during the Swedish-Polish War under similar favorable conditions that had been enjoyed by the Griffins.