Original sentence: Although the city of Naples became known as urbs sanguinum, legends of blood liquefaction are not a unique phenomenon.Records kept at the Duomo tell that on rare occasions the contents fails to liquefy, or is found already liquefied when the ampoules are taken from the safe, or that the "miracle" occurred outside the usual dates.Saint Januarius is famous for the alleged miracle of the annual liquefaction of his blood, which, according to legend, was saved by a woman called Eusebia just after the saint's death.Some credit its invention to a medieval Neapolitan alchemist.The contents (allegedly blood) are stored in two hermetically sealed small ampoules, held since the 17th century in a silver reliquary between two round glass plates about 12 cm wide
Edited sentence: Although the city of Naples became known as urbs sanguinum, the miracle is not a unique phenomenon.Disbelievers credit its invention to a medieval Neapolitan alchemist.Records kept at the Duomo tell that  on rare occasions the blood fails to liquefy, or is found already liquefied when the ampoules are taken from the safe, or that the miracle occurred outside the usual dates.Saint Januarius is famous for the miracle of the annual liquefaction of his blood, which, according to legend, was saved by a woman called Eusebia just after the saint's death.The dried blood is stored in two hermetically sealed small ampoules, held since the 17th century in a silver reliquary between two round glass plates about 12 cm wide