His most important decorative work was a series of painted panels for the office of Baron Cochin, together called "The Legend of St. Hubert", painted between 1895 and 1897. It drew freely upon the Medici Chapel in Florence, and the works of Nicolas Poussin, Delacroix and Pierre Puvis de Chavannes. Cochin and his family appear in one panel, and Denis's wife Anne in another. The panels celebrated families and faith. The Archbishop of Paris celebrated a mass in the office, when the French government nationalized his residence and other church property in 1907.