Example image of eyePlorer eyePlorer map for 'Christianity in the 4th century': Christendom Constantine I and Christianity First Council of Nicaea First seven Ecumenical Councils Orthodoxy Constantine I Edict of Milan Roman Emperor Julian the Apostate Arian controversy Dogma Ecumenical council Heresy Council of Jerusalem Synod Helena (Empress) Aelia Capitolina Christian pilgrimage Imperial cult (ancient Rome) Jerusalem in Christianity Jewish–Roman wars Archaeology Patron saint Socrates of Constantinople True Cross Venus (mythology) Battle of the Milvian Bridge In hoc signo vinces Labarum Constantinople Edict of Toleration by Galerius Galerius Licinius State religion Theodosius I Donatist Arianism Nicene Creed God Constantius II Neoplatonism Judaism Jovian Valens Valentinian I Paganism Religion in ancient Rome Gratian Pontifex Maximus Blessed Virgin Mary