Ossian, ou Les bardes (English: Ossian, or The Bards) is an opera in five acts by the French composer Jean-François Le Sueur. The libretto, by Alphonse François "Paul" Palat-Dercy and Jacques-Marie Deschamps, is based on the Ossian poems of James Macpherson (specifically the poem "Calthon and Colmal"), which had been translated into French by .