Columbia subject headings:
Harvard subject headings:
Christianity--Europe, Western--History.
Church history--Middle Ages, 600-1500
Church renewal.
Princeton subject headings:
Christian biography.
Christianity--Europe, Western--History--To 1500--Sources.
Christianity--Europe, Western--History--To 1500.
Church history--Middle Ages, 600-1500--Sources.
Church history--Middle Ages, 600-1500.
Church renewal--History--To 1500--Sources.
Church renewal--History--To 1500.