Columbia subject headings:
Harvard subject headings:
Droysen, Johann Gustav, 1808-1884--Exhibitions.
Historians--Germany--Biography--Exhibitions.
Historians--Germany--Exhibitions.
Princeton subject headings:
Classicists--Germany--Exhibitions.
Droysen, Johann Gustav, 1808-1884--Exhibitions.
Historians--Germany--Exhibitions.
Politicians--Germany--Exhibitions.