César Franck
Guy de Lioncourt played a major role in the foundation of the César Franck School, acting as its under director, then director in 1942, all the while teaching the composition class. His counterpoint (1914–1931) and music composition (1932–1934) classes at the Schola Cantorum de Paris were formative for a multitude of famous students, as did his classes in composition (1935–1955) and of "déclamation lyrique" (1942–1954) at the César Franck School.