Columbia subject headings:
Civilization, Medieval--Congresses.
Ethnicity--Europe--History--Congresses.
Europe--History--476-1492--Congresses.
Middle Ages--Congresses.
National characteristics--History--Congresses.
Nationalism--Europe--History--Congresses.
Harvard subject headings:
Civilization, Medieval--Congresses
Europe--History--392-814--Congresses.
Middle Ages--Congresses
Princeton subject headings:
Civilization, Medieval--Congresses.
Europe--History--392-814--Congresses.
Middle Ages--History--Congresses.