Columbia subject headings:
Brandenburg (Germany : State)--History--17th century.
Friedrich Wilhelm, Elector of Brandenburg, 1620-1688.
Harvard subject headings:
Brandenburg (Germany : State)--History--17th century.
Friedrich Wilhelm, Elector of Brandenburg, 1620-1688
Princeton subject headings:
Brandenburg (Germany : State)--History--17th century.
Friedrich Wilhelm, Elector of Brandenburg, 1620-1688.