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Friedrich III of Brandenburg

Frederick I
Frederick I of Prussia (cropped).jpg
Frederick I, in coronation robes.
King in Prussia
Reign 18 January 1701 – 25 February 1713
Coronation 18 January 1701, Königsberg
Successor Frederick William I
Duke of Prussia
Reign 29 April 1688 – 18 January 1701
Predecessor Frederick William
Born (1657-07-11)11 July 1657
Königsberg, Prussia
Died 25 February 1713(1713-02-25) (aged 55)
Berlin, Prussia
Spouse Elizabeth Henrietta of Hesse-Kassel
Sophia Charlotte of Hanover
Sophia Louise of Mecklenburg-Schwerin
Issue Luise, Hereditary Princess of Hesse-Kassel
Prince Frederick August
Frederick William I
House Hohenzollern
Father Frederick William, Elector of Brandenburg
Mother Louise Henriette of Orange-Nassau
Religion Calvinism
Signature

Frederick I (German: Friedrich I) (11 July 1657 – 25 February 1713), of the Hohenzollern dynasty, was (as Frederick III) Elector of Brandenburg (1688–1713) and Duke of Prussia in personal union (Brandenburg-Prussia). The latter function he upgraded to royalty, becoming the first King in Prussia (1701–1713). From 1707 he was in personal union the sovereign prince of the Principality of Neuchâtel (German: Fürstentum Neuenburg). He was also the paternal grandfather of Frederick the Great.

Born in Königsberg, he was the third son of Frederick William, Elector of Brandenburg by his father's first marriage to Louise Henriette of Orange-Nassau, eldest daughter of Frederick Henry, Prince of Orange and Amalia of Solms-Braunfels. His maternal cousin was King William III of England. Upon the death of his father on 29 April 1688, Frederick became Elector Frederick III of Brandenburg and Duke of Prussia. Right after ascending the throne Frederick founded a new city southerly adjacent to Dorotheenstadt and named it after himself, the Friedrichstadt.


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