Sansevero Chapel Museum

Tucked into a lane just north of Spaccanapoli, the Cappella Sansevero looks unremarkable from outside. Inside is one of the most extraordinary rooms in Europe. The chapel was the funerary chapel of the di Sangro family, princes of Sansevero, and was transformed in the mid-eighteenth century by Raimondo di Sangro, the seventh prince — soldier, inventor, alchemist, Freemason and the subject of countless Neapolitan legends — into a dense allegorical programme of sculpture. At its centre lies the Veiled Christ, carved by the young Neapolitan sculptor Giuseppe Sanmartino in 1753: the dead Christ lies on a mattress beneath a shroud so thin that you seem to see the wounds, the swollen vein on his forehead and the contours of his face through the marble. For centuries the legend held that the prince had turned a real cloth to stone by alchemy; the truth, that it was carved from a single block, is more astonishing. Around it stand two other virtuoso pieces: Modesty (Pudicizia) by Antonio Corradini, a woman veiled in marble gauze, dedicated to the prince's mother; and Disillusion (Disinganno) by Francesco Queirolo, a man freeing himself from a marble net of almost unbelievable intricacy, dedicated to his father. The vault fresco, the marble labyrinth floor fragment and the family tombs complete the nave. Down a narrow spiral staircase, the Underground Chamber holds the two Anatomical Machines — skeletons of a man and a woman with their arterial and venous systems reconstructed in astonishing detail — which add a strange, unsettling postscript. It is small, it is busy, and it is unmissable.

Booking is the key fact. Entry to the museum requires advance reservation: online tickets are released about two months ahead, with additional slots appearing a couple of days before each date, and small groups can sometimes buy at the ticket office up to a week ahead if there is availability. In high season and on weekends, slots sell out, so book as soon as your Naples dates are fixed. The chapel is open daily except Tuesdays from morning to early evening, with last entry half an hour before closing. Ticket prices are moderate, with reductions for young people and free entry for small children; visitors with disabilities enter free with a reduced fee for a carer. Photography and filming are forbidden inside, and guards enforce it, so look rather than snap — postcards and books in the shop make good souvenirs.

How long to stay is up to you: some visitors spend fifteen minutes, others an hour. The audio guide, about twenty-five minutes, is worth it to decode the allegories and the prince's story. The nave, including the Veiled Christ and the sacristy, is accessible to wheelchair users; the Underground Chamber is not, because it is reached by a narrow historic spiral staircase. Several guided walking tours of the historic centre include timed Sansevero entry, a sensible option when independent slots are gone.

Fitting it in: the chapel is a two-minute walk from Piazza San Domenico Maggiore on Spaccanapoli, so build it into a historic-centre day with Gesù Nuovo, Santa Chiara's majolica cloister, San Gregorio Armeno and the Duomo. Go early or late in the day for a calmer room. Whatever else you cut from a Naples itinerary, keep this: in a city of masterpieces, the Veiled Christ is the one people remember.