Sigismund II Augustus

Polish Zygmunt August

born Aug. 1, 1520, Kraków, Pol.
died July 7, 1572, Knyszyn

King of Poland (1548–72).

Son of Sigismund I, he was crowned coruler with his father in 1530 and ruled the duchy of Lithuania from 1544. After becoming king of Poland (1548), he supported the Teutonic Order in Livonia against Russia (1559) and by treaty incorporated Livonia into Lithuania (1561). Continued threats by Russia compelled Sigismund to unite the lands attached to the Polish crown, and by the Union of Lublin (1569) he united Poland and Lithuania and their respective dependencies. He died childless, which brought the end of the direct Jagiellon dynasty.

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▪ king of Poland
Polish Zygmunt August
born Aug. 1, 1520, Kraków, Pol.
died July 7, 1572, Knyszyn

      last Jagiellon (Jagiellon dynasty) king of Poland, who united Livonia and the duchy of Lithuania (Lithuania, grand duchy of) with Poland, creating a greatly expanded and legally unified kingdom.

      The only son of Sigismund I the Old and Bona Sforza, Sigismund II was elected and crowned coruler with his father in 1530. He ruled the duchy of Lithuania from 1544 and became king of Poland after his father's death in April 1548. After his first wife died childless (1545), he secretly married Barbara Radziwiłł, of a Lithuanian magnate family (1547). When he announced his marriage in 1548, the szlachta (Polish gentry) tried to force an annulment because it feared the influence of the Radziwiłłs. He overcame the opposition, but Barbara died childless in 1551, allegedly poisoned by Sigismund's mother. A third marriage (1553), to his first wife's sister Catherine, also proved childless, and at his death the direct Jagiellon line ended.

      In 1559, when the Livonian Order (a branch of the Teutonic Knights) became too weak to protect itself from Muscovite attacks, it sought and obtained Sigismund's previously offered protection. The Polish king intervened, but, as Livonia continued to be menaced by Muscovy as well as Sweden and Denmark, the Livonian Order and Sigismund II Augustus concluded the Union of Wilno (Vilnius) in 1561: thereby the Livonian lands, north of the Dvina (Daugava) River, were incorporated directly into Lithuania, while Courland, south of the Dvina, became a secular duchy and Polish fief.

      The subsequent war (see Livonian War) with Tsar Ivan IV the Terrible over Livonia compelled Sigismund to strengthen his position by constitutionally uniting all the lands attached to the Polish crown. Supported by the Polish and Lithuanian gentry, Sigismund ceded his hereditary rights in Lithuania to Poland (1564), thus placing the two states in constitutional equality but not in a complete union. In 1569 he formally incorporated Podlasie, Volhynia, and Kiev provinces into the Polish kingdom, thereby giving their representatives seats in the Sejm; the enlarged Sejm then enacted the Union of Lublin (Lublin, Union of) (1569), uniting Poland and Lithuania as well as their respective dependencies.

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Universalium. 2010.

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