Santa Maria Assunta is a Roman Catholic cathedral in Naples, southern Italy.
The Cathedral is the main church of the city and the seat of the Archbishop of Naples. It is widely known as the Cattedrale di San Gennaro, in honour of Saint Januarius, the city's patron saint.
The church houses a vial of the blood of the Saint which is brought out three times a year, on the first Saturday in May, on 19 September and 16 December, when the dried blood usually liquefies. If the blood fails to liquefy, then legend has it that disaster will befall Naples.