His opera "Démophon" was performed at the Grand Opéra in 1788. It helped to make him famous. He soon became director of the Théâtre de Monsieur in the Tuileries, and three years later he went to the Théâtre Feydeau. He started to try out many new ideas in his music. His opera "Lodoïska" (1791) was very popular for the way he showed heroism. His best-known work is "Médée" (1797). "Les deux journées" (1800) was also highly successful for a while.