Orfeo ed Euredice

L'anima del filosofo, ossia Orfeo ed Euridice (The Soul of the Philosopher, or Orpheus and Euridice), Hob. 28/13, is an opera in Italian in four acts by Joseph Haydn, the last he ever wrote. The libretto, by Carlo Francesco Badini, is based on the myth of Orpheus and Euridice as told in Ovid's Metamorphoses. Composed in 1791, the opera was never performed during Haydn's lifetime.
After his patron Prince Nikolaus Esterházy had died in 1790, Haydn travelled to London where he received a commission to write several symphonies. The impresario John Gallini also offered him a contract to write an opera for the King's Theatre but due to a dispute between King George III and the Prince of Wales he was refused permission to stage it. As a result, the score was never completed and some music appears to be missing.