Columbia subject headings:
Harvard subject headings:
Aristocracy (Political science)--Europe--History--Congresses.
Europe--Politics and government--17th century--Congresses.
Europe--Politics and government--18th century--Congresses.
Europe--Social conditions--17th century--Congresses.
Europe--Social conditions--18th century--Congresses.
Nobility--Europe--History--Congresses.
Princeton subject headings:
Europe--History--1517-1648--Congresses.
Europe--History--1648-1789--Congresses.
Europe--Social conditions--17th century--Congresses.
Europe--Social conditions--18th century--Congresses.
Nobility--Europe--Congresses.