Columbia subject headings:
Harvard subject headings:
Bismarck, Otto, Fürst von, 1815-1898.
Catholic Church--Foreign relations--Germany.
Germany--Foreign relations--Catholic Church.
Leo XIII, Pope, 1810-1903
Princeton subject headings:
Bismarck, Otto, Fürst von, 1815-1898.
Catholic Church--Foreign relations--Germany.
Germany--Foreign relations--Catholic Church.
Leo XIII, Pope, 1810-1913.