Caius
4. A presbyter of the church of Rome, who lived about A. D. 310. He was at a later time elected bishop of the gentiles, which probably means, that he received a commission as a missionary to some heathen people, and the power of superintending the churches that might be planted among them. (Phot. Bibl. 48.)
Works
Disputation with Proclus
While he was yet at Rome he engaged in the celebrated disputation with Proclus, the champion of the Montanist heresy, and he subsequently published the whole transaction in the form of a dialogue. (Euseb. Hist. Eccl. 2.25, 3.23, 6.20.)
Against the Montanist Heresy
He also wrote a work against the heresy of Artemon.
Λαβύρινθος
He also was a third work, called Λαβύρινθος, appears likewise to have been directed against Artemon. (Euseb. Hist. Eccl. 5.28; comp. Theodoret. H. E. 4.21.)
Περὶ τῆς παντὸς οὐσίας
Caius is further called by Photius the author of a work Περὶ τῆς παντὸς οὐσίας, which some consider to be the same as the work Περὶ τοῦ παντός, which is still extant, and is usually ascribed to Hippolytus. He denied the Epistle to the Hebrews to be the work of St. Paul, and accordingly counted only 13 genuine epistles of that apostle.
Further Information
Cave, Hist. Lit. i. p. 65; Fabricius, Bibl. Graec. x. p. 693, &c.
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.