When?

AKMA has a good chronology of church history for quick reference:

Fall of Jerusalem 70
†Clement of Rome 100
†Ignatius 107
Pliny-Trajan correspondence 111
Bar Kochba Revolt 135
†Polycarp 155
Montanus begins preaching New Prophecy 156
Justin's Martyrdom 165
† Irenaeus 200
Septimius Severus' Persecution 209-211
†Clement of Alex 215
†Tertullian 220
†Hippolytus 235
Decian Persecution 249-251
†Origen 253
† Cyprian 258
Diocletian's Persecution 303-312
Edict of Milan 311
Council of Arles rules against Donatists, 314
Council of Nicaea 325
† Arius 336
† Anthony 356
Apollinaris elected Bp of Laodicea 361
†Athanasius 373
†Basil 379
†Macrina 380
Council of Constantinople 381
†Gregory of Nazianzus 389
†Gregory of Nyssa 395
†Ambrose 397
†John Chrysostom 407
Fall of Rome 410
†Jerome 420
Nestorius begins preaching against the Theotokos 428
†Augustine 430
Council of Ephesus 431
†Cyril of Alexandria 444
Tome of Leo, 450-ish?
Council of Chalcedon 451
†Benedict of Nursia 543
Gregory sends Augustine to England 597