When was the  sixteenth century King of Poland and Grand Duke of Lithuania died?
Sigismund II Augustus Sigismund II Augustus (Polish: "Zygmunt II August" , Ruthenian: "Żygimont II Awgust", Lithuanian: "Žygimantas II Augustas" , German: "Sigismund II. August" ) (1 August 1520 – 7 July 1572) was the King of Poland and Grand Duke of Lithuania, the only son of Sigismund I the Old, whom Sigismund II succeeded in 1548. Married three times, the last of the Jagiellons remained childless, and through the Union of Lublin introduced a free elective monarchy.
Polish–Lithuanian royal election, 1674 On November 10, 1673, Michael Korybut Wiśniowiecki, King of Poland and Grand Duke of Lithuania, suddenly died in Lwów. The Polish throne was vacant again, so another free election was necessary. As in 1669,the main candidates were French Duke Louis, Grand Conde, Philip William, Elector Palatine (both supported by Louis XIV of France), and Charles V, Duke of Lorraine.