Columbia subject headings:
Harvard subject headings:
Abbaye d'Orval--History.
Abtei Himmerod--History.
Bishops--Biography.
Cistercian monasteries--Belgium--Villers-devant-Orval--History.
Cistercian monasteries--Germany--Eifel--History.
Eifel (Germany)--Church history.
Monasticism and religious orders--History--Middle Ages, 600-1500
Villers-devant-Orval (Belgium)--Church history.
Princeton subject headings:
Abbaye d'Orval--History.
Abtei Himmerod--History.
Bishops--Biography.
Cistercian monasteries--Belgium--Villers-devant-Orval--History.
Cistercian monasteries--Germany--Eifel--History.
Eifel (Germany)--Church history.
Monasticism and religious orders--History--Middle Ages, 600-1500.
Villers-devant-Orval (Belgium)--Church history.