Columbia subject headings:
Benedictines.
Bernard, of Clairvaux, Saint, 1090 or 1091-1153.
Calati, Benedetto, 1914-
Camaldolese.
Gregory I, Pope, approximately 540-604.
Monastic and religious life.
Peter Damian, Saint, 1007?-1072.
Harvard subject headings:
Benedictines.
Camaldolese.
Monastic and religious life.
Monasticism and religious orders--History.
Princeton subject headings:
Benedictines.
Camaldolese.
Monastic and religious life.
Monasticism and religious orders--History.