Columbia subject headings:
Acculturation--Europe--History--To 1500--Congresses.
Civilization, Medieval--Congresses.
Harvard subject headings:
Acculturation--Europe--History--To 1500--Congresses.
Civilization, Medieval--Congresses
Princeton subject headings:
Acculturation--Europe--History--To 1500--Congresses.
Civilization, Medieval--Congresses.