Columbia subject headings:
Monasticism and religious orders--History--Middle Ages, 600-1500--Congresses.
Orders of knighthood and chivalry--History--Congresses.
Harvard subject headings:
Monasteries--Germany--History--Congresses.
Monastic and religious life--Germany--History--Middle Ages, 600-1500--Congresses.
Monasticism and religious orders--Germany--History--Middle Ages, 600-1500--Congresses.
Princeton subject headings: