Christianity was most prevalent in large cities along the Mediterranean Sea in 325 AD. The principal centers of Christianity during this time included Carthage, Rome, Ephesus, Antioch, Damascus, and Jerusalem.
Egypt, North Africa, and Gaul had all adopted the faith by the end of the second century A.D. Jews who had moved in the major Roman Empire cities and worked as merchants, artisans, and intellectuals among the converts as the religion gained popularity. It is generally accepted that the reason Christianity spread so quickly is because people didn't think it was important enough to control, regulate, or persecute because it was viewed as a minor religion. Christians argued that their religion was a fulfillment of Jewish scriptures in response to claims that it was inferior.
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