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