Bishop of Byzantium from AD 69 to 89
d. 89
4th Archbishop of Constantinople (Ecumenical Patriarch)
Polycarpus I of Byzantium was a bishop of Byzantium. He succeeded bishop Onesimus of Byzantium in 69 AD, and served in that office until his death in 89 AD. His last eight years of office were during Roman emperor Domitian's persecution of the Christians. His relics are deposited in the church of Argyropouli.
Byzantium