Prelude to La Traviata

La traviata (The Fallen Woman) is an opera in three acts by Giuseppe Verdi. It is based on La Dame aux camélias (1852), a play by Alexandre Dumas fils adapted from his own 1848 novel. It was first performed on 6 March 1853 at La Fenice opera house in Venice.

The prelude to the opera begins with very soft, very high strings depicting the frail heroine, followed by the main love theme of the opera, which is then played on lower strings while the higher instruments decorate the melody.

source: Wikipedia