Columbia subject headings:
Historians--Germany--Biography--Congresses.
Historiography--Congresses.
Niebuhr, Barthold Georg, 1776-1831--Congresses.
Statesmen--Germany--Biography--Congresses.
Harvard subject headings:
Historians--Germany--Biography--Congresses.
Historiography--Congresses
Niebuhr, Barthold Georg, 1776-1831--Congresses.
Statesmen--Germany--Biography--Congresses.
Princeton subject headings:
Niebuhr, Barthold Georg, 1776-1831--Congresses.
Niebuhr, Barthold Georg, 1776-1831--Exhibitions.