Columbia subject headings:
Europe--Social conditions--17th century.
Peace of Westphalia
Peace-building--Europe--History.
Thirty Years' War, 1618-1648--Peace.
Harvard subject headings:
Europe--History--1648-1789--Congresses.
Peace of Westphalia--Congresses.
Peace--Congresses
Thirty Years' War, 1618-1648--Peace--Congresses.
Princeton subject headings:
Europe--History--1648-1789--Congresses.
Peace of Westphalia--Congresses.
Peace--Congresses.
Thirty Years' War, 1618-1648--Peace--Congresses.