Columbia subject headings:
Harvard subject headings:
Enlightenment--Europe
Enlightenment--Germany--Prussia.
Europe--Civilization--18th century.
Europe--Intellectual life--18th century.
Europe--Social life and customs--18th century.
Frederick II, King of Prussia, 1712-1786--Influence.
Prussia (Germany)--Civilization--18th century.
Prussia (Germany)--Intellectual life--18th century.
Prussia (Germany)--Social life and customs.
Princeton subject headings:
Frederick II, King of Prussia, 1712-1786--Congresses.
Frederick II, King of Prussia, 1712-1786--Influence--Congresses.
Prussia (Germany)--History--Frederick II, 1740-1786--Congresses.
Prussia (Germany)--Social life and customs--Congresses.