Ugo re d 'Italia

Ugo, re d'Italia (Hugo, King of Italy) is an unfinished opera by Gioachino Rossini that was abandoned when the composer and his wife, Isabella Colbran, were staying in London from December 1823 until July of the following year. It was intended that the music was to be set to an existing libretto, La figlia dell'aria, by an unknown author.

Scholar Charles Osborne notes that "Rossini had been contracted to write it for performance in London", during the 1824 season although the London Morning Chronicle of 15 December notes that "he was to write two Operas during the season". No completed opera was ever forthcoming.