<page_title> List of Polish monarchs </page_title> <section_title> Jagiellonian kings </section_title> <table> <cell> Sigismund II Augustus Zygmunt II August King of Poland King <col_header> Name </col_header> </cell> <cell> 1 August 1520 – 7 July 1572 (aged 51) <col_header> Lifespan </col_header> </cell> <cell> 1 April 1548 <col_header> Reign start </col_header> </cell> <cell> Son of Sigismund I and Bona Sforza Also Grand Duke of Lithuania Replaced the personal union of the Kingdom of Poland and the Grand Duchy of Lithuania with a real union and an elective monarchy (Polish–Lithuanian Commonwealth) in 1569 <col_header> Notes </col_header> </cell> </table>
Sigismund II Augustus (1 August 1520 – 7 July 1572) was the King of Poland and Grand Duke of Lithuania, son of Sigismund I, whom succeeded in 1548.