Columbia subject headings:
Church history--12th century.
Church history--13th century.
Church history--Middle Ages, 600-1500.
Friars--History.
Papacy--History--To 1309.
Harvard subject headings:
Church history--12th century.
Church history--13th century
Europe--Church history--600-1500.
Princeton subject headings:
Church history--12th century.
Church history--13th century.
Church history--Middle Ages, 600-1500.
Friars--History.
Papacy--History--To 1309.