Inside the Duomo di Napoli, (Cattedrale di Santa Maria Assunta or Cattedrale di San Gennaro, after Naples' patron saint), the city's grand Gothic cathedral. It was commissioned by King Charles I of Anjou in 1294 and completed in the early 14th century. The church houses a vial which is supposed to hold the coagulated blood of the saint, which is brought out twice a year. The “blood” then usually liquefies; if this doesn't happen, then legend has it that disaster will befall Naples.