Facts and Events
John II Casimir (; ; (22 March 1609 – 16 December 1672) was King of Poland and Grand Duke of Lithuania during the era of the Polish–Lithuanian Commonwealth, Duke of Opole in Upper Silesia, and titular King of Sweden 1648–1660. In Poland, he is known and commonly referred as Jan Kazimierz. His parents were Sigismund III Vasa (1566–1632) and Constance of Austria (1588–1631). His older brother, and predecessor on the throne, was Władysław IV Vasa. Related to the Habsburg rulers of the Holy Roman Empire he was the third and last monarch on the Polish throne from the House of Vasa. He was the last ruler of Polish–Lithuanian Commonwealth bearing a blood connection to the Jagiellon dynasty, through the female line.