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Accession of Sigismund II Augustus

When
1548
Where
Poland/Lithuania
Episodes
1

Sigismund II Augustus succeeded his father, Sigismund I the Old, as King of Poland and Grand Duke of Lithuania in 1548. Following the elder king's death on 1 April 1548, Sigismund II became the sole ruler, allowing him to formally declare his wife Barbara Radziwiłł as Queen and Grand Duchess.

Episodes

  1. 1 April 1548 · Poland/LithuaniaDeath of Sigismund I the Old

    Sigismund I the Old died on 1 April 1548, ending his reign and leaving his son as the sole ruler of Poland and Lithuania.

Background and detail

Succession Context. As the Polish monarchy was elective, Sigismund I and Bona Sforza secured their son's succession by naming him nominal co-ruler during his father's life. Sigismund II had been crowned King of Poland in 1530 and inaugurated as Grand Duke of Lithuania in 1529, establishing his claim before his father's death.

People involved

Sources

  1. Sigismund II Augustus Wikipedia, revision of 2026-09-15

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.