The San Martino Charterhouse (Italian: Certosa di San Martino) is perched on a hill overlooking the Gulf of Naples – a strategic location picked by Charles, Duke of Calabria, who wanted the complex built in 1325 near the Castle of Belforte, now replaced by Castel Sant’Elmo.

Few traces remain today of the ancient gothic style of the structure created by Tino di Camaino and Attanasio Primario, including the Catalan-inspired Lombard band. Most of the building’s original look was indeed altered during the renovations carried out in the 17th century by Cosimo Fanzago, who gave the charterhouse a baroque touch by hiring Naples’s leading artists of the time.