拉瓦省
After childless deaths of two last dukes of Plock (Siemowit VI) and Władysław II of Płock, in 1462 Gostynin’s residents welcomed King Kazimierz Jagiellonczyk, who confirmed all town’s privileges, and attached it to the Kingdom of Poland. From 1462 until 1793, Gostynin was part of Rawa Voivodeship, in which it was the seat of both a Land, and a county. Gostynin continued to prosper - in the period known as the Polish Golden Age, it had 265 houses, inn, mills and a brewery (as for 1564). In 1612, Russian Tsar Vasili IV died at the Gostynin castle, in which he had been kept with two brothers since 1611.