[1] His mother Martine Vallaise was from a noble family of Arnad; his father Eugène Mus was a sculptor from Torgnon.
Here his teachers included Giacomo Grosso, Paolo Gaidano, Luigi Onetti and Marchisio: artists faithful to the impressionist tradition, and who taught him the basics of art.
In 1910, the International Center for the Fine Arts in Rome assembled some of the best known painters of the time, including Chagall, Raoul Dufy, Jean Cocteau and Picasso.
Although very committed to his native Aosta Valley, Mus spent short periods in 1913 working on fresco and restoration projects: first in Lyon and then in Lausanne and in Friesch near Brig in the Swiss the canton of Valais.
The work, modelled in clay and then cast in bronze in Milan, was of an Alpino holding a weapon in his hand and with a fallen comrade across his knees.