Other religions were represented to varying, lesser degrees. The influence of the adjacent Roman and Aksumite civilizations resulted in Christian communities in the northwest, northeast, and south of Arabia. Christianity made a lesser impact in the remainder of the peninsula, but did secure some conversions. With the exception of Nestorianism in the northeast and the Persian Gulf, the dominant form of Christianity was Miaphysitism. The peninsula had been a destination for Jewish migration since Roman times, which had resulted in a diaspora community supplemented by local converts. Additionally, the influence of the Sasanian Empire resulted in Iranian religions being present in the peninsula. Zoroastrianism existed in the east and south, while there is evidence of either Manichaeism or Mazdakism being possibly practiced in Mecca.
