Columbia subject headings:
Germany--History.
Hohenzollern, House of.
Harvard subject headings:
Germany--History.
Germany--Kings and rulers--Biography.
Hohenzollern, House of.
Prussia (Germany)--Kings and rulers--Biography.
Princeton subject headings:
Germany--History.
Germany--Kings and rulers--Biography.
Hohenzollern, House of.
Prussia (Germany)--Kings and rulers--Biography.