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 piece was written to celebrate the French victory at the Battle of Fontenoy in the War of the Austrian Succession. It was revived at the same venue on 21 August 1753.