Columbia subject headings:
Chronology, Historical--Congresses.
Civilization, Modern--16th century--Congresses.
Civilization, Modern--17th century--Congresses.
Civilization--History--Congresses.
Time--History--Congresses.
Harvard subject headings:
Chronology--History.
Civilization, Modern--16th century.
Civilization, Modern--17th century
Civilization--History
Culture--History.
Time--History.
Princeton subject headings:
Chronology--History.
Civilization, Modern--16th century.
Civilization, Modern--17th century.
Civilization--History.
Culture--History.
Time--History.