Development of Christianity By Maddie O'Connor 312 Constantine converts to Christianity 313 Constantine stopped persecution of Christians 325 The Council Of Nicea 336 Death of Constantine 430 Death of Augustine 451 Council of Chalcedon Sep 11, 1054 Great Schism Sep 11, 1415 Council of Constance Sep 11, 1420 Crusade against Hussites Sep 11, 1483 Birth of Martin Luther Mar 2, 2022 Augustine coverts to Christianity Mar 2, 2022 Charlemagne crowned emporer by the Pope Mar 2, 2022 Christianity made officaial Religion Mar 2, 2022 Second Council of Nicea