Columbia subject headings:
Diplomatics--Europe--History.
Europe--Politics and government--476-1492.
Middle Ages.
Harvard subject headings:
Diplomatics--Europe--History.
Europe--Politics and government--476-1492.
Middle Ages.
Princeton subject headings:
Copyists--Europe--History--Congresses.
Diplomatics--Europe--History--Congresses.
Europe--Politics and government--476-1492--Congresses.
Middle Ages--History--Congresses.