2. Timeline 300 – 500 A.D. 300 A.D . 400 A.D . 500 A.D. 350 A.D . 450 A.D . Conversion of Constantine Council of Nicea Athanasius Jerome completes Vulgate Conversion of Augustine Ambrose Bishop of Milan Chrysostom -Bishop of Constantinople Patrick Missionary to Ireland Council of Chalcedon Jerome Augustine