It"s an urban culture; the city is crucial. Roman empire is a mediterranean empire, the highway around which the roman empire rose. Rome, carthage, byzantium (founded later), alexandria, jerusalem, etc. Christianity was initially not tolerated in the roman empire. Constantine and his mother, st. helena, in 306, is serving in the army in the north of england, The barbarians, however, are living on the other side of the rhine and the danube rivers and he hears that one of the four emperors has died and his troops have proclaimed him. Emperor, so he rushes down to rome to claim his title. In october of 312, he fights a battle against one of his co-emperors, but before he fights the battle, he apparently hears a voice telling him that he will be victorious if he fights under a. Christian symbol, so he is victorious and decides to follow christianity, eventually making it one of the tolerated religions in the roman empire.