Columbia subject headings:
Harvard subject headings:
Church history--Middle Ages, 600-1500
Church history--Primitive and early church, ca. 30-600
Civilization, Medieval
Social history--Medieval, 500-1500
Princeton subject headings:
Church history--Middle Ages, 600-1500.
Church history--Primitive and early church, ca. 30-600.
Civilization, Medieval.
Social history--Medieval, 500-1500.