Columbia subject headings:
Christianity and culture--History--Middle Ages, 600-1500--Congresses.
Civilization, Medieval--13th century--Congresses.
Thirteenth century--Congresses.
Harvard subject headings:
Christianity and culture--History--Middle Ages, 600-1500--Congresses.
Civilization, Medieval--13th century--Congresses.
Thirteenth century--Congresses.
Princeton subject headings:
Civilization, Medieval--Congresses.
Intellectual life--History--To 1500--Congresses.
Philosophy, Medieval--Congresses.
Thirteenth century--Congresses.