Columbia subject headings:
Authority--History--To 1500--Congresses.
Civilization, Medieval--Congresses.
Political stability--History--To 1500--Congresses.
Power (Christian theology)--History--To 1500--Congresses.
Power (Social sciences)--History--To 1500--Congresses.
Harvard subject headings:
Authority--History--To 1500--Congresses.
Civilization, Medieval--Congresses
Political stability--History--To 1500--Congresses.
Power (Christian theology)--History--To 1500--Congresses.
Power (Social sciences)--History--To 1500--Congresses.
Princeton subject headings:
Authority--History--Congresses.
Power (Christian theology)--History of doctrines--Middle Ages, 600-1500--Congresses.
Power (Social sciences)--History--To 1500--Congresses.