Columbia subject headings:
Harvard subject headings:
Civilization, Medieval--Congresses
Civilization, Medieval.
Nobility--Congresses.
Nobility--History.
Princeton subject headings:
Civilization, Medieval--Congresses.
Europe--Social conditions--To 1492--Congresses.
Europe--Social life and customs--Congresses.
Knights and knighthood--Europe--Congresses.
Nobility--Europe--Congresses.
Social history--Medieval, 500-1500--Congresses.