the Sabbath, disputed Canon 60 named 26 NT books (excluded Revelation) 366–367 Antipope Ursicinus, rival to Pope Damasus I 367–403 Epiphanius, Bishop of Salamis, wrote Panarion against heresies 370–379 Basil the Great, Bishop of Caesarea 370? Doctrine of Addai at Edessa proclaims 17 book NT canon using Diatessaron (instead of the 4 Gospels) + Acts + 15 Pauline Epistles (inc. 3 Corinthians) Syriac Orthodox Church 370 (d. ca.) Optatus of Milevis, who in his conflict with the sectarian Donatists stressed unity and catholicity as marks of the Church over and above holiness, and also that the sacraments derived their validity from God, not from the priest 372–394 Gregory, Bishop Of Nyssa 373 Ephrem the Syrian, cited Western Acts 374–397 Ambrose, governor of Milan until 374, then made Bishop of Milan 375–395 Ausonius, Christian governor of Gaul 379–381 Gregory Nazianzus, Bishop of Constantinople 380, February 27: Emperor Theodosius I issues the Edict of Thessalonica, declaring Nicene Christianity as the state church of the Roman Empire 380, November 24: Emperor Theodosius I is baptised 381 First Council of Constantinople, 2nd ecumenical: Jesus had true human soul, Nicene Creed of 381 382 Catholic Council of Rome under Pope Damasus I sets the Biblical canon, listing the inspired books of the Old Testament and the New Testament (disputed) 383? Frumentius, Apostle of Ethiopia 385 Priscillian, first heretic to be executed? 386 Cyril of Jerusalem: wrote compellingly of catholicity of the Church 390? Apollinaris, Bishop of Laodicea, believed Jesus had human body but divine spirit 391 Theodosian decrees outlaw most pagan rituals still practiced in Rome 396–430 Augustine, bishop of Hippo, considered the founder of formalized Christian theology (Nicene and Post-Nicene Fathers) 397? Saint Ninian evangelizes Picts in Scotland 398–404 John Chrysostom, Patriarch of Constantinople, see also List of Patriarchs of Constantinople, (Nicene and Post-Nicene Fathers) 400: Jerome's Vulgate (Latin edition and translation of the Bible) is published 400? Ethiopic Bible: in Ge'ez, 81 books, standard Ethiopian Orthodox Bible 400? Peshitta Bible in Syriac (Aramaic), Syr (p), OT + 22 NT, excludes: 2Pt, 2-3Jn, Jude, Rev; standard Syriac Orthodox Church Bible 406 Armenian Bible, translated by Saint Mesrop, standard Armenian Orthodox Bible 410, 24 August: Sack of Rome by Alaric and the Visigoths 412–444 Cyril, bishop of Alexandria, coined Hypostatic union 418–419 Antipope Eulalius, rival to Pope Boniface I 420 St. Jerome, Vulgate translator, Latin scholar, cited expanded ending in Mark after Mark 16:8, Pericope