Key Events in the development of Christianity By ®åçh3l Period: 300 to Aug 28, 1500 Development of Christianity 312 Emperor Constantine's coversion to Christianity 313 Edict of Milan establishes official toleration of Christianity 325 Council of Nicea 336 Death of Constantine 354 Birth of Augustine 367 Athanasius lists all 27 books of NT 400 Jerome's Vulgate (translation of the Greek Bible into Latin) 407 John Chrysostom dies 411 Council of Carthage condemns Donatists 417 Pope Innocent I condemns Pelagianism 420 Death of Jerome 430 Death of Augustine 431 Council of Ephesus 451 Council of Chalcedon Sep 9, 1054 Great Schism between East and West Sep 9, 1093 Anselm becomes Archbishop of Canterbury Sep 9, 1095 1095 Council of Council of Clermont: Pope Urban II proclaims First Crusade Sep 9, 1098 Crusaders take Antioch from Turks Sep 9, 1099 Crusaders recapture Jerusalem from Turks Sep 9, 1122 Concordat of Worms Sep 9, 1141 Peter Abelard condemned Sep 9, 1144 Fall of Edessa (crusader state) Sep 9, 1187 Fall of Jerusalem to Turks Sep 9, 1215 Fourth Lateran Council Period: Sep 9, 1309 to Sep 9, 1377 Babylonian Captivity Period: Sep 9, 1337 to Sep 9, 1453 Hundred Years' War Period: Sep 9, 1378 to Sep 9, 1423 Great Western Schism Sep 9, 1409 Council of Pisa Period: Sep 9, 1413 to Sep 9, 1414 Lollard rebellion Sep 9, 1415 Council of Constance. Martyrdom of Jan Hus. Sep 9, 1420 Crusade against Hussites Sep 9, 1431 Joan of Arc martyred Period: Sep 9, 1431 to Sep 9, 1449 Council of Basel Period: Sep 9, 1438 to Sep 9, 1455 Council of Ferrara-Florence Sep 9, 1453 Fall of Constantinople to Turks Sep 9, 1478 Spanish Inquisition founded by Ferdinand and Isabella Sep 9, 1483 Birth of Martin Luther Sep 9, 1492 Expulsion of Jews from Spain by Ferdinand and Isabella Mar 2, 2022 Basil the Great dies Mar 2, 2022 Christianity made official religion of Roman Empire Mar 2, 2022 Council of Constantinople Mar 2, 2022 Augustine converts to Christianity Mar 2, 2022 Gregory of Nazianzus dies Mar 2, 2022 Gregory of Nyssa dies Mar 2, 2022 Olga of Russia converts to Christianity Mar 2, 2022 787 Second Council of Nicea