Despite what is often asserted, during his seventeen years in the service of Mlle de Guise, Charpentier was not the "director" of the Guise ensemble. The director was a gentleman of Mlle de Guise's court, an amateur musician, Italophile, and Latinist named Philippe Goibaut, familiarly called "Monsieur Du Bois." Owing to Mlle de Guise's love for Italian music (a passion she shared with Du Bois), and her frequent entertaining of Italians passing through Paris, there was little reason for Charpentier to conceal the Italianisms he had learned in Rome.