Cappella Sansevero

There is a marble sculpture in this chapel that has made grown adults weep. The Veiled Christ, carved by Giuseppe Sanmartino in 1753, depicts the dead body of Jesus covered by a transparent veil — except the veil isn't real. It's marble. Every fold, every wrinkle, every place where the fabric clings to skin is carved from a single block of stone, and it is so impossibly lifelike that for centuries people refused to believe it was sculpture. They insisted the chapel's patron, Prince Raimondo di Sangro, had used alchemy to petrify a real cloth veil draped over marble.

Di Sangro was the kind of 18th-century aristocrat who made everyone nervous. A Freemason Grand Master, inventor, alchemist, and the prince of one of Naples' oldest families, he turned the family chapel into something between a church and a science experiment. The Anatomical Machines in the basement — two skeletons with their entire circulatory systems preserved in what appears to be metallic wire — are still not fully explained. Di Sangro claimed he injected a special substance into the veins of two servants (consensually, he insisted), and the results have baffled scientists for 250 years.

Every sculpture in the chapel tells a story. Antonio Corradini's Modesty shows a woman draped in a marble veil so fine you can see the inscription on the tablet she holds. Francesco Queirolo's Disillusion depicts a man struggling free from a marble net carved from a single block — a feat considered so technically impossible that Queirolo was reportedly told by other sculptors it couldn't be done.

The chapel is small and gets crushingly crowded. Go early, stand in front of the Veiled Christ, and look at the face. You'll forget it's stone.