Columbia subject headings:
Monasticism and religious orders--History--Middle Ages, 600-1500--Congresses.
Harvard subject headings:
Monastic and religious life--History--Middle Ages, 600-1500.
Monasticism and religious orders--History--Middle Ages, 600-1500--Congresses.
Monasticism and religious orders--History--Middle Ages, 600-1500.
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500
Princeton subject headings: