Fodor's Expert Review San Pietro ad Aram
On the site of Naples's oldest church, it contains an altar where Saint Peter supposedly preached while in Naples. Enter by the side door on Corso Umberto I, and you'll find the altar in the vestibule at the back, along with a 16th-century fresco depicting the preaching scene. The church also houses two canvases by Luca Giordano. Descend into the labyrinthine crypt on Monday and Wednesday afternoons and Sunday mornings, where the first Christian community in Europe was founded and the first six saints of Naples are buried.