Columbia subject headings:
Harvard subject headings:
Holy Roman Empire--History--1517-1648--Congresses.
Holy Roman Empire--History--1648-1804--Congresses.
Lithuania--Politics and government--Congresses.
Poland--Politics and government--Congresses.
Princeton subject headings:
Holy Roman Empire--History--1517-1648--Congresses.
Holy Roman Empire--History--1648-1804--Congresses.
Lithuania--Politics and government--Congresses.
Poland--Politics and government--Congresses.