Columbia subject headings:
Church and state--Europe--History.
Europe--Church history--600-1500.
Europe--Politics and government--476-1492.
Harvard subject headings:
Church and state--Europe--History
Europe--Church history--600-1500.
Europe--Politics and government--476-1492.
Princeton subject headings:
Church and state--Europe--History.
Europe--Church history--600-1500.
Europe--History--476-1492.
Europe--Politics and government--476-1492.