Columbia subject headings:
Europe--History--476-1492--Congresses.
Europe--Kings and rulers--Congresses.
Europe--Kings and rulers--Genealogy--Congresses.
Middle Ages--Congresses.
Royal houses--Congresses.
Harvard subject headings:
Europe--History--476-1492--Congresses.
Europe--Kings and rulers--Congresses.
Europe--Kings and rulers--Genealogy--Congresses.
Middle Ages--Congresses
Royal houses--Congresses.
Princeton subject headings:
Europe--History--476-1492--Congresses.
Europe--Kings and rulers--Congresses.
Europe--Kings and rulers--Genealogy--Congresses.
Middle Ages--Congresses.
Royal houses--Congresses.