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John Sigismund of Brandenburg

John Sigismund
Elector of Brandenburg
Duke of Prussia
Johann Sigismund 02 IV 13 2 0026 01 0318 a Seite 1 Bild 0001.jpg
John Sigismund, Elector of Brandenburg
Elector of Brandenburg
Reign 1608–1619
Predecessor Joachim Frederick
Successor George William
Duke of Prussia
Reign 1618–1619
Predecessor Albert Frederick
Successor George William
Born (1572-11-08)8 November 1572
Halle
Died 23 December 1619(1619-12-23) (aged 47)
Berlin
Spouse Anna, Duchess of Prussia
Issue George William
Anne Sophia
Maria Eleonora
Catherine
Joachim Sigismund
Agnes
John Frederick
Albrecht Christian
House Hohenzollern
Father Joachim III Frederick, Elector of Brandenburg
Mother Catherine of Brandenburg-Küstrin
Religion Lutheranism (until 1613)
Calvinism (since 1613)

John Sigismund (German: Johann Sigismund; 8 November 1572 – 23 December 1619) was a Prince-elector of the Margraviate of Brandenburg from the House of Hohenzollern. He became the Duke of Prussia through his marriage to Duchess Anna, the eldest daughter of Duke Albert Frederick of Prussia who died without sons. Their marriage resulted in the creation of Brandenburg-Prussia.

John Sigismund was born in Halle an der Saale to Joachim III Frederick, Elector of Brandenburg, and his first wife Catherine of Brandenburg-Küstrin. He succeeded his father as Margrave of Brandenburg in 1608. In 1611, John Sigismund traveled from Königsberg to Warsaw, where on 16 November 1611 he gave feudal homage to Sigismund III Vasa, King of Poland (the Duchy of Prussia was a Polish fief at the time). He officially became Duke of Prussia in 1618, although he had served as regent on behalf of the mentally-disturbed Albert Frederick, Duke of Prussia, for several years prior. John Sigismund died in the following year.

John Sigismund gave the Reichshof Castrop to his teacher and educator Carl Friedrich von Bordelius, whereas he received the territories of Cleves, Mark, and Ravensberg in the Treaty of Xanten in 1614.


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