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.
Janusz Radziwiłł (1579–1620) Janusz Radziwiłł (Lithuanian: "Jonušas Radvila" ),(Belarusian: Януш Радзівіл ) (2 July 1579 – 3 December 1620) was a noble and magnate of the Polish–Lithuanian Commonwealth. He was the deputy cup-bearer of the Grand Duchy of Lithuania since 1599, the castellan of Vilnius since 1619, and the starost of Borysów. Radziwiłł also held the title of "Reichsfürst" (Imperial Prince) of the Holy Roman Empire.