There is also a Theophilus of Alexandria (c. 412 AD). Theophilus () was Patriarch of Antioch from 169 until 182. He succeeded Eros c. 169, and was succeeded by Maximus I c. 183, according to Henry Fynes Clinton, but these dates are only approximations. His death probably occurred between 183 and 185. His writings (the only remaining being his apology to Autolycus) indicate that he was born a pagan, not far from the Tigris and Euphrates, and was led to embrace Christianity by studying the Holy Scriptures, especially the prophetical books. He makes no reference to his office in his existing writings, nor is any other fact in his life recorded. Eusebius, however, speaks of the zeal which he and the other chief shepherds displayed in driving away the heretics who were attacking Christ's flock, with special mention of his work against Marcion. He made contributions to the departments of Christian literature, polemics, exegetics, and apologetics. William Sanday describes him as "one of the precursors of that group of writers who, from Irenaeus to Cyprian, not only break the obscurity which rests on the earliest history of the Church, but alike in the East and in the West carry it to the front in literary eminence, and distance all their heathen contemporaries". Works Eusebius and Jerome mention numerous works of Theophilus existing in their time. They are: the existing Apologia addressed to Autolycus; a work against the heresy of Hermogenes; against that of Marcion; some catechetical writings; Jerome also mentions having read some commentaries on the gospel and on Proverbs, which bore Theophilus's name, but which he regarded as inconsistent with the elegance and style of his other works. The Apology to Autolycus The one undoubted extant work of Theophilus, the 7th Bishop of Antioch (c. 169–c. 183), is his Apology to Autolycus (Apologia ad Autolycum), a series of books defending Christianity written to a pagan friend. The ostensible object of Ad Autolycum is to convince a pagan friend, Autolycus, a man of great learning and an earnest seeker after truth, of the divine authority of the Christian religion, while at the same time exhibiting the falsehood and absurdity of paganism. His arguments, drawn almost entirely from the Old Testament, with but very scanty references to the New Testament, are largely chronological. He makes the truth of Christianity depend on his demonstration that the books of the Old Testament were