Léon Vasseur

Félix Augustin Joseph Vasseur, known as Léon Vasseur (28 May 1844 – 25 May 1917), was a French composer, organist and conductor. While working as a cathedral organist, he turned to composing operettas and soon had a hit with La timbale d'argent (1872). He wrote another thirty operettas but never repeated that early success. He also composed church music including two settings of the mass.

Read more about this composer on Wikipedia.