Anna, Margravine von Brandenburg (27 August 1487 , Berlin û3 May 1514 , Kiel ) was a German noblewoman .
She was the daughter of Johann Cicero , Elector of Brandenburg and Margarethe of Saxony . At age 15, on 10 April 1502 she married King Frederick I of Denmark . They had two children: Christian III of Denmark (12 August 1503û 1 January 1559 ) Dorothea (1 August 1504 û 11 April 1547 ), married 1 July 1526 to Duke Albert of Prussia . She died in 1514 at age 26. Her husband remarried, to Sophie of Pomerania , and had six more children.