A layman martyred at Nicomedia in ancient Bithynia, remembered with his companions Augustus and Augustine in a record that gives little beyond a place and a shared death.

Saint Flavius is venerated as a lay martyr of Nicomedia, a major city of ancient Bithynia in what is now Turkiye, with a death traditionally placed in the third century. He is named together with two companions, Augustus and Augustine, suggesting a shared arrest or a shared local cult rather than an isolated case. No details of his life, occupation, or the specific persecution under which he died have survived, and the honest record is limited to his name, place, and companionship in martyrdom.

Quick Facts

• Died: III century? (Nicomedia, Bithynia, modern Turkiye)
• Venerated as: Lay martyr
• Companions: Saints Augustus and Augustine

Who Was Saint Flavius?

The available record places Flavius as a layman who died for the Christian faith at Nicomedia, an imperial city of Bithynia on the Asian side of the Roman Empire, with the death commonly dated to the third century though not with certainty. He is grouped with two other martyrs, Augustus and Augustine, a pairing that likely reflects either a joint arrest or a shared feast established by the local church. Nothing further about his background has come down through the centuries.

Historical Setting

Nicomedia was one of the great cities of the later Roman Empire, at times serving as an imperial residence, and it was also the site of some of the fiercest anti-Christian measures of the era, including the opening edicts of the persecution under Diocletian at the very start of the fourth century. A martyr’s cult rooted in this city sits naturally within that broader history of Christians in Bithynia paying with their lives for refusing to offer sacrifice to the state gods.

Why the Church Remembers Saint Flavius

The Church remembers Flavius because a local community judged his death, alongside Augustus and Augustine, to be a testimony worth preserving in its liturgical memory. That memory does not require a narrative of heroics to carry weight; it is enough that the local church of Nicomedia counted him among those who died rather than deny their faith, and passed that conviction down through an unbroken chain of commemoration.

Canonization and Feast Day

No formal canonization process exists for Saint Flavius, as would be expected for a martyr of the ancient Bithynian church; the modern process of canonization postdates him by well over a thousand years. His veneration rests on ancient and immemorial cult, received into the Church’s broader calendar through the ordinary channel of long local memory rather than through any recorded papal decree.

What Catholics Can Learn Today

Flavius and his companions stand as a reminder that the early Church’s martyrs were, for the most part, ordinary believers rather than dramatic figures whose stories survived in detail. Their value to Catholics today lies precisely in that ordinariness: faithfulness under pressure does not require fame, and a life remembered only by three names and a city can still testify to something real and costly.

A Prayer to Saint Flavius

Saint Flavius, who bore witness to Christ at Nicomedia alongside Augustus and Augustine, intercede for us who face far smaller pressures to compromise our faith. Grant us a portion of the courage that let you stand firm when standing firm cost everything, and help us remain faithful in the small and unnoticed moments of our own lives. Amen.

Sources

• The Roman Martyrology
• Butler’s Lives of the Saints, general entries on the martyrs of Bithynia