Columbia subject headings:
Harvard subject headings:
Europe--History--476-1492--Historiography--Congresses.
Europe--Politics and government--476-1492--Congresses.
Historiography--Europe--History--To 1500--Congresses.
Middle Ages--Historiography--Congresses
Power (Social sciences)--Europe--History--To 1500--Congresses.
Princeton subject headings:
Europe--Politics and government--476-1492--Congresses.
Historiography--Europe--History--To 1500--Congresses.
Power (Social sciences)--Europe--History--To 1500--Congresses.