Frederick III of Brandenburg, nicknamed the Fat, also the Younger was Margrave of the Brandenburg and Lord of the Altmark.
Background
Frederick was the youngest son of the Elector Frederick I of Brandenburg (1371–1440) from his marriage to Elizabeth (1383–1442 ), daughter of the Duke Frederick of Bavaria-Landshut. His father"s testament, stipulated that Frederick should rule the Margraviate of Brandenburg jointly with his older brother Frederick Irontooth, who also acted as his guardian from 1440 onwards, until at least 1456.
Career
Frederick III, however, began urging for more independence in 1445. In 1447, Frederick received his own territory, consisting of the Altmark and Prignitz, under the sovereignty of Electoral Brandenburg. Frederick III resided in Tangermünde, Salzwedel and Arneburg.
Since Frederick died without male heirs, the Altmark and Priegnitz fell back to the Electorate of Brandenburg when he died in 1463.
Frederick was buried in the Church of Saint George in Arneburg. During the Thirty Years" War his tomb was looted and destroyed.
His remains were recovered and buried in Berlin.
