Columbia subject headings:
Harvard subject headings:
Europe--Church history.
Europe--History, Military.
Europe--History--1492-1648.
Europe--History--15th century.
Europe--History--476-1492.
Military art and science--Europe--History
Princeton subject headings:
Europe--Church history.
Europe--History, Military.
Europe--History--1492-1648.
Europe--History--476-1492.