Les fêtes de Polymnie (The Festivals of Polyhymnia) is an opéra-ballet in three entrées and a prologue by Jean-Philippe Rameau.
The work was first performed on 12 October 1745 at the Opéra, Paris, and is set to a libretto by Louis de Cahusac.
The first entrée is entitled La fable (Legend) and depicts the marriage of Hercules and Hebe, the goddess of youth.
The second entrée, L'histoire ("History"), tells the story of the Hellenistic king of Syria Seleucus I Nicator, who gives up his fiancée Stratonice when he learns his son Antiochus I Soter is passionately in love with her (this tale was also the subject of a later 18th century French opera, Étienne Méhul's Stratonice).
The third and final entrée is called La féerie ("Fairy tale") and is set in the Middle East.