St. Januarius (d. 305 A.D.), also known as San Gennaro, was the Bishop of Benevento, Italy. Little is known of his early life. He was arrested and imprisoned for his faith while visiting other Christians in jail during the persecution of Roman Emperor Diocletian. Many attempts were made to kill him, but one after another they failed. He was thrown into a fiery furnace, but he came out unscathed. He was then thrown to wild beasts in the amphitheater, but they did not attack. He was finally beheaded, and his blood was collected by Christians and kept in a sealed glass vial for veneration. The vial of blood is still kept today in the Naples cathedral, and it has continually demonstrated miraculous properties for which no scientific explanation has been offered. St. Januarius' blood liquefies and becomes fresh on particular occasions throughout the year, especially his feast day, for which the saint has become famous. This phenomenon has been occurring with regularity for centuries, and is one of the "blood miracles" that is historically well-documented among the relics of certain saints. He is the patron saint of blood banks and the city of Naples, Italy. St. Januarius's feast day is September 19th.