Columbia subject headings:
Europe--Kings and rulers--Congresses.
Kings and rulers, Medieval--Congresses.
Middle Ages--Congresses.
Monarchy--Europe--History--To 1500--Congresses.
Power (Social sciences)--Europe--History--To 1500--Congresses.
Harvard subject headings:
Europe--Kings and rulers--Congresses.
Kings and rulers, Medieval--Congresses.
Middle Ages--Congresses
Monarchy--Europe--History--To 1500--Congresses.
Power (Social sciences)--Europe--History--To 1500--Congresses.
Princeton subject headings:
Europe--Kings and rulers--Congresses.
Kings and rulers, Medieval--Congresses.
Middle Ages--Congresses.
Monarchy--Europe--History--To 1500--Congresses.
Power (Social sciences)--Europe--History--To 1500--Congresses.