Columbia subject headings:
Harvard subject headings:
Communication in politics--Europe--Congresses.
Europe--History--1492---Congresses.
Europe--Kings and rulers--Congresses.
Europe--Kings and rulers--History--Congresses.
Europe--Politics and government--1492-1648--Congresses.
Public administration--Europe--History--Congresses.
Princeton subject headings:
Communication in politics--Europe--Congresses.
Europe--History--1492---Congresses.
Europe--Kings and rulers--History--Congresses.
Europe--Politics and government--1492-1648--Congresses.
Public administration--Europe--History--Congresses.