Columbia subject headings:
Harvard subject headings:
Estates (Social orders)--Europe--History--Congresses.
Europe--History--1517-1648--Congresses.
Europe--History--1648-1789--Congresses.
Legislative bodies--Europe--History--Congresses.
Political customs and rites--Europe--History--Congresses.
Social classes--Europe--History--Congresses.
Princeton subject headings:
Political customs and rites--Europe--History--16th century--Congresses.
Political customs and rites--Europe--History--17th century--Congresses.
Political customs and rites--Europe--History--18th century--Congresses.