I was reading Catholic dot Org about St. Cecilia. This story is obviously just that--a story. A legend that was built upon some fact. I love the story because Cecilia, a Lay Person, converted 400 people. Given that this is legend, there probably wasn't 400, but it has to be some people, right? I love this stuff.
The story of S. Cecilia is not without beauty and merit. There was in the city of Rome a virgin named Cecilia, who was given in marriage to a youth named Valerian. She wore sackcloth next to her skin, and fasted, and invoked the saints and angels and virgins, beseeching them to guard her virginity. And she said to her husband, "I will tell you a secret if you will swear not to reveal it to anyone." And when he swore, she added, "There is an angel who watches me, and wards off from me any who would touch me." He said, "Dearest, if this be true, show me the angel." "That can only be if you will believe in one God, and be baptized."
She sent him to Pope S. Urban (223-230), who baptized him; and when he returned, he saw Cecilia praying in her chamber, and an angel by her with flaming wings, holding two crowns of roses and lilies, which he placed on their heads, and then vanished. Shortly after, Tibertius, the brother of Valerian, entered, and wondered at the fragrance and beauty of the flowers at that season of the year.
When he heard the story of how they had obtained these crowns, he also consented to be baptized. After their baptism the two brothers devoted themselves to burying the martyrs slain daily by the prefect of the city, Turcius Almachius. [There was no prefect of that name.] They were arrested and brought before the prefect, and when they refused to sacrifice to the gods were executed with the sword.
In the meantime, S. Cecilia, by preaching had converted four hundred persons, whom Pope Urban forthwith baptized. Then Cecilia was arrested, and condemned to be suffocated in the baths. She was shut in for a night and a day, and the fires were heaped up, and made to glow and roar their utmost, but Cecilia did not even break out into perspiration through the heat. When Almachius heard this he sent an executioner to cut off her head in the bath. The man struck thrice without being able to sever the head from the trunk. He left her bleeding, and she lived three days. Crowds came to her, and collected her blood with napkins and sponges, whilst she preached to them or prayed. At the end of that period she died, and was buried by Pope Urban and his deacons.
Alexander Severus, who was emperor when Urban was Pope, did not persecute the Church, though it is possible some Christians may have suffered in his reign. Herodian says that no person was condemned during the reign of Alexander, except according to the usual course of the law and by judges of the strictest integrity. A few Christians may have suffered, but there can have been no furious persecutions, such as is described in the Acts as waged by the apocryphal prefect, Turcius Almachius.
Urbanus was the prefect of the city, and Ulpian, who had much influence at the beginning of Alexander's reign as principal secretary of the emperor and commander of the Pretorian Guards, is thought to have encouraged persecution. Usuardus makes Cecilia suffer under Commodus. Molanus transfers the martyrdom to the reign of Marcus Aurelius. But it is idle to expect to extract history from romance.
In 1599 Cardinal Paul Emilius Sfondrati, nephew of Pope Gregory XIV, rebuilt the church of S. Cecilia.
St. Cecilia is regarded as the patroness of music [because of the story that she heard heavenly music in her heart when she was married], and is represented in art with an organ or organ-pipes in her hand.
From The Lives of the Saints by the Rev. S. Baring-Gould, M.A., published in 1914 in Edinburgh.