Columbia subject headings:
Teutonic Knights--History.
Harvard subject headings:
Europe--Church history.
Europe--Religion--History.
Military religious orders--Germany--History.
Military religious orders--Germany--Prussia--History.
Military religious orders--Livonia--History.
Teutonic Knights--History.
Princeton subject headings:
Europe--Church history.
Europe--Religion--History.
Military religious orders--Germany--History.
Military religious orders--Germany--Prussia--History.
Military religious orders--Livonia--History.
Teutonic Knights--History.