Columbia subject headings:
Harvard subject headings:
Constitutional history--Germany--Prussia--Congresses.
Prussia (Germany)--Politics and government--Congresses.
Regionalism--Germany--Prussia--History--Congresses.
Princeton subject headings:
Constitutional history--Germany--Prussia.
Monarchy--Germany--Prussia.
Prussia (Germany)--Politics and government.
Prussia (Germany)--Relations.
Regionalism--Germany--Prussia--History.