Marcion of Sinope (ca. 110-160) was a Christian theologian who was excommunicate by the early Christian church at Rome as a heretic. His teachings were influential during the 2nd century and a few centuries after, rivaling that of the Church of Rome. As he offered an alternative theology to the Canonical, Proto-orthodox, Trinitarian and Christological views of the Roman Church, the early Church Fathers denounced him sharply; their views dominate Christianity today.