Columbia subject headings:
Church and the world--Congresses.
Middle Ages--Congresses.
Harvard subject headings:
Church and the world--Congresses.
Church history--Middle Ages, 600-1500--Historiography--Congresses.
Europe--History--476-1492--Historiography--Congresses.
Middle Ages--Congresses
Middle Ages--Historiography--Congresses
Princeton subject headings: