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