The extraordinary Chiesa del Gesù Nuovo is an architectural Kinder Surprise. Its shell is the 15th-century, Giuseppe Valeriani–designed facade of Palazzo Sanseverino, converted to create the 16th-century church. Inside, piperno-stone sobriety gives way to a gob-smacking blast of baroque that could make the Vatican blush: a vainglorious showcase for the work of top-tier artists such as Francesco Solimena, Luca Giordano and Cosimo Fanzago.

　　The church is the final resting place of much-loved local saint Giuseppe Moscati (1880–1927), a doctor who served the city's poor. Adjacent to the right transept, the Sale di San Giuseppe Moscati (Rooms of St Joseph Moscati) include a recreation of the great man's study, complete with the armchair in which he died. Scan the walls for ex-voti, gifts offered by the faithful for miracles purportedly received. The church itself received a miracle of sorts on 4 August 1943, when a bomb dropped on the site failed to explode. Its shell is aptly displayed beside the ex-voti.

　　The church flanks the northern side of beautiful Piazza del Gesù Nuovo, a favourite late-night hang-out for students and lefties. At its centre soars Giuseppe Genuino's lavish Guglia dell'Immacolata, an obelisk built between 1747 and 1750. On 8 December, the Feast of the Immacolata, a firefighter scrambles up to the top to place a wreath on the statue of the Virgin Mary.