Le roi Arthus (King Arthur) is an opera in three acts by the French composer
Ernest Chausson to his own libretto. It was composed between 1886 and 1895, and first performed 30 November 1903 at the Théâtre de la Monnaie, Brussels, after long delays. The musical style is heavily influenced by the works of
Richard Wagner, particularly
Tristan und Isolde and
Parsifal, as well as
César Franck. The scenery at the premiere was designed by Albert Dubosq and the symbolist painter Fernand Khnopff; it was executed by Dubosq's atelier together with Chausson's brother-in-law Henry Lerolle and under the supervision of Chausson's widow.
The opera was revived at the Paris Opera in May 2015 with Thomas Hampson in the title role, Sophie Koch as Genièvre and Roberto Alagna as Lancelot, conducted by Philippe Jordan, in a production by Graham Vick.