Rubuta ci gaba don wannan sakin layi - A cikin 1627 a lokacin Yaƙin Shekaru talatin, an sake gina garin bayan an lalata shi da wuta. Lokacin da dukes na Pomeranian suka mutu a cikin 1637 Bytów ya daina zama yanki na Poland kuma ya zama Poland ta mallake shi kai tsaye, a tsarin gudanarwa wani ɓangare na Voivodeship na Pomeranian. Daga nan sai masu daraja na gida suka sami daidaitattun hakkoki tare da masu daraja na duk Polish-Lithuanian Commonwealth. Bytów ya kasance a cikin inuwar Lębork, wanda ya bunkasa da sauri kuma ya zama wurin zama na shugabannin gari. A shekara ta 1651 an sami takaddama tsakanin hukumomin birni da starost Jakub Wejher, game da harajin da aka jinkirta. Don samun abokin tarayya a kan Sweden a lokacin Ruwan Tsufana
, a cikin 1657 Sarki John II Casimir na Poland ya ba Lauenburg da Bütow Land ga Margrave Frederick William na Brandenburg-Prussia a matsayin gado na gado a cikin Yarjejeniyar Bydgoszcz. Kodayake Poland har yanzu tana riƙe da ikon mallaka, garin yana ƙarƙashin Brandenburg kuma, bayan 1701, ta Masarautar Prussia. Brandenburg ya sanya haraji mafi girma don biyan bashinsa bayan Yakin Shekaru talatin. A lokacin karni na 18, garin ya sha wahala daga gobara da annoba.