The Grand Prix of Naples was an auto racing event, held in Posillipo, outside Napoli. In its original incarnation, it began in 1934. Known as the Coppa Principessa di Piemonte in honor of Marie-José of Belgium, it continued from the same event held in 1933 in the Circuito Province Meridionale. It was held again from 1937 to 1939, although from 1938 it was purely a Voiturette race and attracted all-Maserati entries.