Common Orthodoxy enjoys a continued existence from Pentecost. Almost any encyclopedia will testify to this. Throughout the centuries, the same teachings, principles, faith, and unity in Christ have remained steadfast. The hierarchy (bishops) of the Orthodox Church can trace the order of their succession all the way back to Christ and the Apostles, in an unbroken chain known as Apostolic Succession.
Saint Pelagia of Tinos, 23 July