Overlooking Piazza Umberto I, this baroque 17th-century church boasts a well-preserved marble floor (taken from Villa Jovis) and a statue of San Costanzo, Capri’s patron saint. Note the pair of languidly reclining patricians in the chapel to the south of the main altar, who seem to mirror some of the mildly debauched folk in the cafes outside. Beside the northern chapel is a reliquary with a saintly bone that reputedly saved Capri from the plague in the 19th century.