Columbia subject headings:
Middle Ages--Congresses.
Millennialism--History--Congresses.
Harvard subject headings:
Civilization, Medieval--Congresses
Middle Ages--Congresses
Millennialism--Europe--History of doctrines--Middle Ages, 600-1500--Congresses.
Millennialism--History--Congresses.
Princeton subject headings:
Civilization, Medieval--Congresses.
Middle Ages--Congresses.
Millennialism--Europe--History of doctrines--Middle Ages, 600-1500--Congresses.
Millennialism--History--Congresses.