Eleanor of Prussia
Eleanor of Prussia (German: Eleonore von Preußen; 21 August 1583 – 9 April 1607) was a princess of the Duchy of Prussia by birth and Electress of Brandenburg by marriage. Life. Eleanor was the fourth daughter of Albert Frederick of Prussia (1553–1618), from his marriage to Marie Eleonore (1550–1608), daughter of Duke William "the Rich" of Jülich-Cleves-Berg. The princess grew up with her sisters in Königsberg Castle. She married Joachim Frederick, Elector of Brandenburg (1546–1608), in Berlin on 2 November 1603 as his second wife. They married for political reasons: on the one hand, Joachim Frederick  hoped to strengthen his influence on Prussia, where he acted as regent for Eleanor's insane father; on the other hand, he hoped to gain control of Jülich-Cleves-Berg, Eleanor's maternal inheritance. Eleanor died at the age of 23 shortly after giving birth to her only child. She was buried on 26 April 1607 in the family crypt of the House of Hohenzollern in the Berlin Cathedral. Children. From her marriage Eleanor had one daughter, Maria Eleonore, who married Count Palatine Louis Philip, Count Palatine of Simmern-Kaiserslautern in 1631.