Columbia subject headings:
Church history--Middle Ages, 600-1500.
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500.
Harvard subject headings:
Church history.
Civilization, Medieval.
Princeton subject headings:
Church and state--History.
Church history--Middle Ages, 600-1500.
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500.