Main events
Crimean War: Fall of Sebastopol, Sep 8-10
Leopold II succeeds in Belgium

In Paris
World Fair, May to November
Courbet's Realism Expo
Offenbach starts Les Bouffes Parisiens for operettas
Whistler arrives

Music
Verdi: Sicilian Vespers
Literature
Longfellow: Haiawatha
Whitman: Leaves of Grass
Dickens: Little Dorrit
Tennyson: Maud
Nerval commits suicide
Thackeray: Vanity Fair into French

Atalanta October 5th: Goldschmidt discovers asteroid Atalanta