San Gennaro, or St. Januarius, fourth-century bishop of Benevento, is the patron saint of Naples, Italy. He was eventually beheaded during the reign of Diocletian, and his body was brought to Naples, along with a vial containing some of his blood. The congealed blood, preserved since that time in the Cathedral of San Gennaro, is claimed to liquefy on the anniversary of his death each year—an event that has drawn crowds to Naples since 1389. Discuss
Source: The Free Dictionary