Duomo

Dedicated to Naples’s patron saint, the medieval cathedral of San Gennaro is hidden behind a bland, pseudo-Gothic facade. But the dimly lit interior is splendid, home to paintings by Luca Giordano and his followers and topped by a magnificent gilt coffered ceiling.

The glittering Cappella del Tesoro di San Gennaro, a symphony of gilt and colored marble, houses a silver bust containing two vials of the saint's congealed blood, which liquefies three times a year, most famously on September 19.