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".
The Marriage of Figaro
Lorenzo Da Ponte wrote a preface to the first published version of the libretto, in which he boldly claimed that he and Mozart had created a new form of music drama:
In spite ... of every effort ... to be brief, the opera will not be one of the shortest to have appeared on our stage, for which we hope sufficient excuse will be found in the variety of threads from which the action of this play "[i.e. Beaumarchais's]" is woven, the vastness and grandeur of the same, the multiplicity of the musical numbers that had to be made in order not to leave the actors too long unemployed, to diminish the vexation and monotony of long recitatives, and to express with varied colours the various emotions that occur, but above all in our desire to offer as it were a new kind of spectacle to a public of so refined a taste and understanding.