Family and the See of Byzantium
The traditional life sets Metrophanes within a household closely bound to the early Byzantine church. His father, Dometius, is described as a brother of the Roman emperor Probus (276–282) who embraced Christianity during a time of persecution and came to Byzantium with his sons, where they were instructed by Bishop Titus. Dometius was ordained presbyter and afterward raised to the episcopal throne, and his sons Probus and Metrophanes are said to have held the see in turn.
Through Metrophanes the church of Byzantium emerges into clearer historical light; he is reckoned among the early bishops of the city and is the first of them whose tenure is attested by surviving sources, before the city's later rise to imperial and ecclesiastical prominence.