Columbia subject headings:
Civilization, Medieval--Congresses.
Civilization, Western--Political aspects--History--To 1500--Congresses.
Europe--Politics and government--476-1492--Congresses.
Surveys--Europe--History--To 1500--Congresses.
Harvard subject headings:
Civilization, Medieval--Congresses
Civilization, Western--Political aspects--History--To 1500--Congresses.
Europe--Politics and government--476-1492--Congresses.
Surveys--History--To 1500--Congresses.
Princeton subject headings:
Civilization, Medieval--Congresses.
Civilization, Western--Political aspects--History--To 1500--Congresses.
Europe--Politics and government--476-1492--Congresses.
Surveys--History--To 1500--Congresses.