La Sylphide
"La Sylphide" is often confused with the 1909 ballet "Les Sylphides", another ballet involving a mythical sylph. The latter was choreographed by Michel Fokine for the Ballets Russes, using music by Frédéric Chopin, as a short performance. Though inspired by "La Sylphide", it was meant to be performed as an independent ballet with its own merits.