Arrigo Boito

Arrigo Boito was an Italian poet, journalist, novelist, librettist and composer, best known today for his libretti, especially those for Giuseppe Verdi's operas Otello and Falstaff, and his own opera Mefistofele. Along with Emilio Praga, and his own brother Camillo Boito he is regarded as one of the prominent representatives of the Scapigliatura artistic movement.
Born in Padua, the son of Silvestro Boito, an Italian painter of miniatures and his wife, a Polish countess, Józefina Radolińska, Boito studied music at the Milan Conservatory with Alberto Mazzucato until 1861. His older brother, Camillo Boito, was an Italian architect and engineer, and a noted art critic, art historian and novelist.
In 1866 he fought under Giuseppe Garibaldi in the Seven Weeks War in which the Kingdom of Italy and Prussia fought against Austria, after which Venice was ceded to Italy.
Boito wrote very little music, but completed (and later destroyed) the opera, Ero e Leandro, and left incomplete a further opera, Nerone, which he had been working at, on and off, between 1877 and 1915. Excluding its last act, for which Boito left only a few sketches, Nerone was finished after his death by Arturo Toscanini and Vincenzo Tommasini and premiered at La Scala, 1924. He also left a Symphony in A minor in manuscript.
His only finished opera, Mefistofele, based on Goethe's Faust, was given its first performance on 5 March 1868, at La Scala, Milan. The premiere, which he conducted himself, was badly received, provoking riots and duels over its supposed "Wagnerism", and it was closed by the police after two performances. Boito withdrew the opera from further performances to rework it, and it had a more successful second premiere, in Bologna on 1875. Boito's revised and drastically cut version also changed Faust from a baritone to a tenor. 
Boito's literary powers never dried up. As well as writing the libretti for his own operas, he wrote them for other composers. As "Tobia Gorrio" (an anagram of his name) he provided the libretto for Amilcare Ponchielli's La GiocondaHis rapprochement with Verdi  after they had collaborated on Verdi's Inno delle nazioni ("Anthem of the Nations", London, 1862), was effected by the music publisher Giulio Ricordi whose long-term aim was to persuade Verdi to write another opera. Verdi agreed to Boito revising the libretto for the original 1857 Simon Boccanegra, which musicologist Roger Parker speculates was based on a desire to "test the possibility" of working with Boito before possibly embarking on the larger project, which eventually became Otello. The revised Simon Boccanegra premiered to great acclaim in 1881. With that, their mutual friendship and respect blossomed.
Although Verdi's aim to write the music for an opera based on Shakespeare's King Lear never came to fruition—despite the existence of a libretto—Boito provided subtle and resonant libretti for Verdi's last two masterpieces, Otello (which was based on Shakespeare's play Othello) and Falstaff based on The Merry Wives of Windsor and parts of Henry IV. After their years of close association, when Verdi died in 1901, Boito was at his bedside.
Between 1887 and 1894, he had an affair with celebrated actress Eleonora Duse. Their relationship was carried out in a highly clandestine manner, presumably because of Boito's many aristocratic friends and acquaintances. The two remained on good terms until his death.
Towards the end of his musical career, Boito succeeded Giovanni Bottesini as director of the Parma Conservatory after the latter's death in 1889 and held the post until 1897. He received the honorary degree of doctor of music from the University of Cambridge in 1893, and when he died in Milan, and was buried there in the Cimitero Monumentale.