Ernest Gagnon (07/11/1834 - 15/09/1915), a Canadian composer, professor and historian, born in Louiseville (Québec). He is remembered today for his landmark folksong collection, the Chansons populaires du Canada, his arrangements of folksongs, and his role in the plainchant restoration movement in Quebec in the second half of the nineteenth century. Gagnon's initiatives as an administrator are also recognized, notably in projects such as the establishment of the Union musicale de Québec and the Académie de musique de Québec.