HOW DID CHRISTIANITY REACH ROME FROM JERUSALEM?

Christianity spread along the routes that Judaism had already passed through. Because Puteoli, south of Rome and just north of Naples, hosted the only pre-Christian Jewish settlements in Italy known, it would follow that Christianity emerged from out of the Jewish Synogogues. The stretch from Puteoli to Rome in the first half of the first century was the main trade route between the east and the city of Rome. This is typically how the eastern traditions were introduced to Rome, the worlds capital city of its time.