Relics and Reliquaries in Naples

Does this church in Naples hold the true tomb of Vlad the Impaler, the notoriously cruel figure who inspired Bram Stoker's Dracula?

The relics of dozens of martyrs are stored in a single chapel.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

These "anatomical machines" are only one of the many strange items in this Italian crypt.