Columbia subject headings:
Church history--Middle Ages, 600-1500.
Civilization, Medieval.
Harvard subject headings:
Church history--Middle Ages, 600-1500--Congresses.
Civilization, Medieval--Congresses
Europe--Religious life and customs.
Manselli, Raoul
Middle Ages--Congresses
Theology--History--Middle Ages, 600-1500--Congresses
Princeton subject headings:
Church history--Middle Ages, 600-1500--Congresses.
Middle Ages--History--Congresses.
Theology--History--Middle Ages, 600-1500--Congresses.