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Frederick I, Margrave of Brandenburg

Frederick (German: Friedrich) I (1271-1440), Burgrave of Nuremberg, was created margrave of Brandenburg by Sigismund, Holy Roman Emperor in 1415, inaugurating 400 years of rule over the area by the Hohenzollern family which was ultimately to preside over Germany's political unification.

Frederick's sons included John III the Alchemist, regent during Frederick's absence supporting Sigismund in Bohemia's Hussite Wars; his successor Frederick II; and Albert Achilles.