Columbia subject headings:
Bible--Influence--Medieval civilization.
Church history--Middle Ages, 600-1500.
Church history--Primitive and early church, ca. 30-600.
Harvard subject headings:
Christian life--History--Middle Ages, 600-1500.
Theology--History--Middle Ages, 600-1500
Princeton subject headings:
Christian life--History--Middle Ages, 600-1500.
Theology--History--Middle Ages, 600-1500.