Atys (Attis) is a tragédie en musique, a type of early French opera, in a prologue and five acts by Jean-Baptiste Lully to a libretto by Philippe Quinault based on Ovid's Fasti. It was premiered on 10 January 1676 by Lully's Académie Royale de Musique (Paris Opera) for the royal court at the Château de Saint-Germain-en-Laye and was first performed in public in April at the Théâtre du Palais-Royal in Paris. Although this opera was met with indifference by the Parisian audience, it became known as "the king's opera" because of King Louis XIV's love for it. It was repeated for Louis XIV in 1678 and 1682.