Columbia subject headings:
Carolingians.
Church history--Middle Ages, 600-1500.
Harvard subject headings:
Canon law--History.
Christian life--History--Middle Ages, 600-1500.
Church history--Middle Ages, 600-1500
Princeton subject headings:
Canon law--History.
Christian life--History--Middle Ages, 600-1500.
Church history--Middle Ages, 600-1500.