Title: Three peace congresses of the nineteenth century
Subjects: Eastern question (Balkan), Congress of Vienna (1814-1815), Treaty of Paris, Congress of Berlin (1878), Treaty of Paris (1856), Berlin (Germany), Berlin (Germany). Congress, 1878, Congress of Berlin (1878) (uri) http://id.loc.gov/authorities/names/n50026606 (uri) http://viaf.org/viaf/sourceID/LC|n50026606, Congress of Vienna (1814-1815) (uri) http://id.loc.gov/authorities/names/n50055590 (uri) http://viaf.org/viaf/sourceID/LC|n50055590