"La Belle Dame sans Merci" ("The Beautiful Lady Without Mercy") is a ballad produced by the English poet John Keats in 1819. The title was derived from the title of a 15th-century poem by Alain Chartier called La Belle Dame sans Mercy.
Considered an English classic, the poem is an example of Keats' poetic preoccupation with love and death. The poem is about a fairy who condemns a knight to an unpleasant fate after she seduces him with her eyes and singing. The fairy inspired several artists to paint images that became early examples of 19th-century femme fatale iconography. The poem continues to be referenced in many works of literature, music, art, and film.