Columbia subject headings:
Harvard subject headings:
Electors (Kurfürsten)--Biography.
Hohenzollern, House of.
Prussia (Germany)--History--Frederick William, the Great Elector, 1640-1688.
Prussia (Germany)--Kings and rulers--Biography.
Reformation--Germany--Prussia--History.
Reformation--Germany--Prussia.
Princeton subject headings:
Electors (Kurfürsten)--Biography.
Hohenzollern, House of.
Prussia (Germany)--Kings and rulers--Biography.
Reformation--Germany--Prussia.