Columbia subject headings:
Authors and patrons--Europe--History--18th century.
Enlightenment.
Philosophers--Europe--History--18th century.
Harvard subject headings:
Authors and patrons--Europe--History--18th century.
Enlightenment.
Philosophers--Europe--History--18th century.
Princeton subject headings:
Authors and patrons--Europe--History--18th century.
Enlightenment.
Philosophers--Europe--History--18th century.