Subjects of his mature works included landscapes and figure studies, particularly of mother and child. But his primary interestDenis responded in 1907, with the neoclassical "Bacchus and Ariadne", brightening his colors and showing a happy family romping nude but more modestly on a beach. He painted a series of works of nudes at the beach, an homage to the bathers of Raphael and the classical nudity of the Venus de Milo and other Greek sculpture. remained the painting of religious subjects, like "The dignity of labour", commissioned in 1931 by the International Federation of Christian Trade Unions to decorate the main staircase of the Centre William Rappard.