Schola Cantorum de Paris
After resigning from the Navy in 1894, he began to study harmony in Roubaix, first with Julien Koszul (grandfather of composer Henri Dutilleux), who encouraged him to pursue his formation in Paris with Eugène Gigout; Roussel then continued his studies until 1908 at the Schola Cantorum de Paris, where one of his teachers was Vincent d'Indy. While studying, Roussel also taught. His students included Erik Satie and Edgard Varèse. ()