Léon Vallas

Léon Vallas (17 May 1879 in Roanne – 9 May 1956 in Lyon) was a 20th-century French musicologist.

Orphaned at 8 years of age, after studying at the St. Mary's Institution at St. Chamond, held by the Marists, he passed his baccalaureate and studied medicine in Lyon, which he dropped out. In 1908, he defended a thesis of musicology on La Musique à l'Académie de Lyon au XVIIIe ("Music at the Academy of Lyon in the 17th Century").

A collaborator of Vincent d'Indy, in 1902 he became a music critic at Tout Lyon, then founded La Revue musicale de Lyon in 1903, which became the Revue française de musique, then the Nouvelle revue musicale. He was involved in the creation of the "Société des grands concerts" in 1905, with the composer Georges Martin Witkowski and the construction of the Salle Rameau () in 1908.

A physician during the war, he received his doctorate in 1919 on Un Siècle de musique et de théâtre à Lyon (1688–1789) ("A Century of Music and Theatre in Lyon (1688–1789)") and returned to Le Progrès in Lyon where he was a music critic for 35 years.

In 1925, he founded the "Conférences de musique vivante" in Paris and taught courses at the Sorbonne. From 1929 to 1935, he lectured worldwide for the Alliance Française, which led him to be made Chevalier de la Légion d'honneur in 1934.

He was elected president of the Société française de musicologie in 1937, until 1943 and a member of the Academy of Sciences, Humanities and Arts of Lyon in 1947. He applied twice (1924 and 1941), unsuccessfully, to the leadership of the Conservatoire de musique de Lyon.

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