Polycarp of Smyrna

Polycarp makes apostolic succession concrete. Irenaeus says Polycarp learned from John the Apostle, and Irenaeus himself learned from Polycarp; that puts one of the great second-century theologians only two living links from the apostolic generation. His Letter to the Philippians shows a church already reading Paul, guarding doctrine, and expecting bishops and presbyters to hold a common rule of faith. His martyrdom also became one of the earliest models for how Christians remembered a saint's death: not as defeat, but as witness.