Marcion of Sinope (ˈmɑrkiən,_-siən; Μαρκίων Σινώπης; 85-160) was an early Christian theologian in early Christianity. Marcion preached that God had sent Jesus Christ, who was an entirely new, alien god, distinct from the "vengeful" God (Demiurge) who had created the world. He considered himself a follower of Paul the Apostle, whom he believed to have been the only true apostle of Jesus Christ; his doctrine is called Marcionism. Marcion published the earliest record of a canon of New Testament books.
Early Church Fathers such as Justin Martyr, Irenaeus, and Tertullian denounced Marcion as a heretic or antichrist, and he was excommunicated by the church of Rome around 144. He published his own canon of Christian sacred scriptures, which contained ten Pauline epistles (the Pastoral epistles were not included) and the Gospel of Marcion which historically is claimed to be an edited version of the Gospel of Luke. Several modern scholars have theorized that Marcion's Gospel was the oldest, although this has received strong criticism as it seems to rest on special pleading.
This made Marcionism a catalyst in the process of the development of the New Testament canon by forcing the proto-orthodox Church to respond to his canon.
Epiphanius records in his Panarion that Marcion was born the son of a bishop in Pontus (modern-day Turkey), likely Philologus of Sinope. Rhodo and Tertullian, young men in Marcion's old age, described him as a "mariner" and a "ship-master" respectively. Some time in the late 130s, Marcion traveled to Rome, joined the Roman church, and made a large donation of 200,000 sesterces to the congregation there. Conflicts with the church of Rome arose and he was eventually excommunicated in 144, his donation being returned to him. After his excommunication, he returned to Asia Minor, where he continued to lead his many church congregations and teach the Gospel of Marcion.
According to Christian sources, Marcion's teacher was the Simonian Cerdo. Irenaeus writes that "a certain Cerdo, originating from the Simonians, came to Rome under Hyginus [.