Paul of Samosata, and the Heresy introduced by him at Antioch
1 After Xystus had presided over the church of Rome for eleven years, Dionysius, namesake of him of Alexandria, succeeded him. About the same time Demetrianus died in Antioch, and Paul of Samosata received that episcopate.
2. As he held, contrary to the teaching of the Church, low and degraded views of Christ, namely, that in his nature he was a common man, Dionysius of Alexandria was entreated to come to the synod. But being unable to come on account of age and physical weakness, he gave his opinion on the subject under consideration by letter. But all the other pastors of the churches from all directions, made haste to assemble at Antioch, as against a despoiler of the flock of Christ.
Source: Church History (New Advent)