Pierre Beaumarchais
In 1786, Wolfgang Amadeus Mozart composed an opera, "Le Nozze di Figaro", based on "The Marriage of Figaro", with a libretto by Lorenzo Da Ponte based on the play. Several composers including Paisiello in 1782 wrote operas based on "The Barber of Seville". Rossini's 1816 version is his most successful work and still often performed. In 1966, Darius Milhaud composed an opera, "La mère coupable", based on "The Guilty Mother".
Libretto
By the 20th century some librettists became recognised as part of famous collaborations, as with Gilbert and Sullivan or Rodgers and Hammerstein. Today the composer (past or present) of the musical score to an opera or operetta is usually given top billing for the completed work, and the writer of the lyrics relegated to second place or a mere footnote, a notable exception being Gertrude Stein, who received top billing for "Four Saints in Three Acts". Another exception was Alberto Franchetti's 1906 opera "La figlia di Iorio" which was a close rendering of a highly successful play by its librettist, Gabriele D'Annunzio, a celebrated Italian poet, novelist and dramatist of the day. In some cases, the operatic adaptation has become more famous than the literary text on which it was based, as with Claude Debussy's "Pelléas et Mélisande" after a play by Maurice Maeterlinck.