Columbia subject headings:
Frederick II, King of Prussia, 1712-1786--Congresses.
Prussia (Germany)--History--Frederick II, 1740-1786--Congresses.
Prussia (Germany)--Politics and government--1740-1786--Congresses.
Harvard subject headings:
Frederick II, King of Prussia, 1712-1786--Congresses.
Prussia (Germany)--History--Frederick II, 1740-1786--Congresses.
Prussia (Germany)--Politics and government--1740-1786--Congresses.
Princeton subject headings:
Franconia (Germany)--History.
Frederick II, King of Prussia, 1712-1786.
Prussia (Germany)--History--Frederick II, 1740-1786.