Polycarpus I (Greek: Πολύκαρπος Α) was a bishop of Byzantium. He succeeded Bishop Onesimus in 71, and served in that office for eighteen years until his death in 89. His last eight years of office (from 81) were during Emperor Domitian's persecution of the Christians[1]. His relics are deposited in the Cathedral of Argyropolis.
| Preceded by Onesimus |
Bishop of Byzantium 69–89 |
Succeeded by Plutarch |