Columbia subject headings:
Harvard subject headings:
Europe--Boundaries--History--Congresses.
Europe--History--1492-1648--Congresses.
Europe--History--1648-1789--Congresses.
Territory, National--Europe--Congresses.
Princeton subject headings:
Europe--Boundaries--History--Congresses.
Europe--History--1492-1648--Congresses.
Europe--History--1648-1789--Congresses.