Columbia subject headings:
Civilization, Modern--21st century--Congresses.
Enlightenment--Congresses.
Enlightenment--Influence--Congresses.
Harvard subject headings:
Civilization, Modern--21st century--Congresses
Enlightenment--Congresses
Enlightenment--Influence--Congresses.
Princeton subject headings:
Civilization, Modern--21st century--Congresses.
Enlightenment--Congresses.
Enlightenment--Influence--Congresses.