Columbia subject headings:
Diplomacy--History.
Europe--Foreign relations--1492-1648.
Europe--Foreign relations--1648-1789.
Harvard subject headings:
Diplomacy
Diplomacy--History
Europe--Diplomatic history--16th century.
Europe--Diplomatic history--17th century.
Europe--Diplomatic history--18th century.
International relations--History
International relations--History--16th-18th century.
Princeton subject headings:
Diplomacy--History.
Europe--Diplomatic history--16th century.
Europe--Diplomatic history--17th century.
Europe--Diplomatic history--18th century.
International relations--History.