During the Protestant Reformation most of the town's inhabitants converted to Lutheranism. In 1626, it was occupied by king Gustav II Adolf of Sweden, who built a pontoon bridge across river Vistula and who had his camp at the southern side of the town.[1] After the war Tczew was visited twice by Polish King Władysław IV Vasa, in 1634/1635 and 1636.[9] Although it was rebuilt, it then suffered during the Polish-Swedish Wars.