Columbia subject headings:
Congress of Berlin (1878)
Congress of Vienna (1814-1815)
Eastern question (Balkan)
Istanbul (Turkey)
Treaty of Paris (1856)
Harvard subject headings:
Congress of Berlin (1878)
Congress of Vienna (1814-1815)
Eastern question (Balkan)
Istanbul (Turkey)
Treaty of Paris
Princeton subject headings:
Berlin (Germany). Congress, 1878.
Eastern question (Balkan)
Istanbul (Turkey)
Treaty of Paris
Vienna (Austria)--Congress, 1814-1815.