Columbia subject headings:
Liberty--Middle Ages, 600-1500--Congresses.
Religious thought--Middle Ages, 600-1500--Congresses.
Harvard subject headings:
Civilization, Medieval--Congresses
Liberty--History--To 1500--Congresses.
Liberty--Religious aspects--Christianity--History of doctrines--Middle Ages, 600-1500--Congresses.
Political science--History--To 1500--Congresses.
Princeton subject headings:
Civilization, Medieval--Congresses.
Liberty--History--To 1500--Congresses.
Liberty--Religious aspects--Christianity--History of doctrines--Middle Ages, 600-1500--Congresses.
Political science--History--To 1500--Congresses.