Columbia subject headings:
Harvard subject headings:
Art, Medieval--Congresses
Civilization, Medieval--12th century--Congresses.
Civilization, Medieval--13th century--Congresses.
Literature, Medieval--History and criticism--Congresses
Princeton subject headings:
Art, Medieval--Congresses.
Civilization, Medieval--12th century--Congresses.
Civilization, Medieval--13th century--Congresses.
Literature, Medieval--History and criticism--Congresses.