After Lully died (in 1687), the number of new works per year almost doubled, since his successors (Pascal Collasse, Henri Desmarets, André Campra, André Cardinal Destouches, and Marin Marais) had greater difficulty sustaining the interest of the public. Revivals of Lully's works were common. French composers at the Opéra generally wrote music to new librettos, which had to be approved by the directors of the company. The Italian practice of preparing new settings of existing librettos was considered controversial and did not become the norm in Paris until around 1760. One of the most important of the new works during this period was an "opéra-ballet" by Campra called "L'Europe galante" presented in 1697.