Киевское воеводство
Following the Union of Lublin, Zhytomyr (known in Polish as Żytomierz) became an important center of local administration, seat of the starosta, and capital of Żytomierz County. Here, sejmiks of Kiev Voivodeship took place. In 1572, the town had 142 buildings, a manor house of the starosta and a castle. Following the privilege of King Sigismund III Vasa, Zhytomyr had the right for two fairs a year. The town, which enjoyed royal protection of Polish kings, prospered until the Khmelnytsky Uprising (1648), when it was captured by Zaporozhian Cossacks and their allies, Crimean Tatars. Its residents were murdered, Zhytomyr was burned to the ground, and all government files were destroyed. In 1667, Zhytomyr became capital of Kiev Voivodeship, and in 1724, a Jesuit school and monastery were opened here. By 1765, Zhytomyr had five churches, including 3 Roman Catholic and 2 Orthodox, and 285 houses.