Saint Sebastian (died c. 288 AD) was an early Christian saint and martyr. According to traditional belief, he was killed during the Roman emperor Diocletian’s persecution of Christians. He is commonly depicted in art and literature tied to a post or tree and shot with arrows. Despite this being the most common artistic depiction of Sebastian, he was, according to legend, rescued and healed by Irene of Rome. Shortly afterwards he went to Diocletian to warn him about his sins, and as a result was clubbed to death.He is venerated in the Roman Catholic and Orthodox Church churches.

The details of Saint Sebastian’s martyrdom were first spoken of by 4th-century bishop Ambrose of Milan (Saint Ambrose), in his sermon (number 22) on Psalm 118. Ambrose stated that Sebastian came from Milan and that he was already venerated there at that time. Saint Sebastian is a popular male saint, especially among athletes.

According to Sebastian’s 18th-century entry in Acta Sanctorum, still attributed to Ambrose by the 17th-century hagiographer Jean Bolland, and the briefer account in the 14th-century Legenda Aurea, he was a man of Gallia Narbonensis who was taught in Milan. In 283, Sebastian entered the army in Rome under Emperor Carinus to assist the martyrs. Because of his courage he became one of the captains of the Praetorian Guards under Diocletian and Maximian, who were unaware that he was a Christian.

According to tradition, Marcus and Marcellian were twin brothers from a distinguished family and were deacons. Both brothers married, and they resided in Rome with their wives and children. The brothers refused to sacrifice to the Roman gods and were arrested. They were visited by their parents Tranquillinus and Martia in prison, who attempted to persuade them to renounce Christianity. Sebastian succeeded in converting Tranquillinus and Martia, as well as Saint Tiburtius, the son of Chromatius, the local prefect. Another official, Nicostratus, and his wife Zoe were also converted. It has been said that Zoe had been a mute for six years; however, she made known to Sebastian her desire to be converted to Christianity. As soon as she had, her speech returned to her. Nicostratus then brought the rest of the prisoners; these 16 persons were converted by Sebastian.

Chromatius and Tiburtius converted; Chromatius set all of his prisoners free from jail, resigned his position, and retired to the country in Campania. Marcus and Marcellian, after being concealed by a Christian named Castulus, were later martyred, as were Nicostratus, Zoe, and Tiburtius.