Columbia subject headings:
Harvard subject headings:
Brandenburg (Germany : State)--Kings and rulers--Biography.
Electors (Kurfürsten)--Biography.
Frederick I, Elector of Brandenburg, 1371-1440
Princeton subject headings:
Brandenburg (Germany : State)--Kings and rulers--Biography.
Electors (Kurfürsten)--Biography.
Frederick I, Elector of Brandenburg, 1371-1440.