Isabella Jagiellon was the queen consort of Hungary. She was the oldest child of Sigismund I the Old, King of Poland, and his Italian wife Bona Sforza.
Portrait by Lucas Cranach the Younger, 1553
19th-century portrait of Isabella
Portrait of John Zápolya
Suleiman receives Isabella and her infant son John Sigismund in 1541
Sigismund I the Old was King of Poland and Grand Duke of Lithuania from 1506 until his death in 1548. Sigismund I was a member of the Jagiellonian dynasty, the son of Casimir IV and younger brother of Kings John I Albert and Alexander I Jagiellon. He was nicknamed "the Old" in later historiography to distinguish him from his son and successor, Sigismund II Augustus. Before ascending to the Polish and Lithuanian thrones, he was Duke of Głogów from 1499, Duke of Opava from 1501, and governor of Silesia from 1504 on behalf of his brother, King Vladislaus II of Bohemia and Hungary.
Portrait by Kulmbach, 1511-1518
Sigismund (far right) with Emperor Maximilian I and brother Vladislaus II in Vienna, 1515. Woodcut by Albrecht Dürer
Sigismund grants a noble status to the professors of the Jagiellonian University, 1535. Painting by Jan Matejko
Medal featuring the profile of Sigismund I, by Giovanni Maria Mosca