PALLADIUS, heretical bishop of RATIARIA. — Having been elected bishop, he initially sided with the Photinians and was therefore deposed at the Council of Sirmium in 351.
He regained his see by converting to Arianism and remained until the end one of the principal supporters of the party in Illyricum. At the time of the Nicene restoration, he initially managed to avoid condemnation by not appearing at the Council of Sirmium (July 378) and invoking the convocation of a general council where he hoped to justify himself. He was, however, compelled to attend the Council of Aquileia (3 Sept. 381), where St Ambrose, reading to him the letter of Arius to Alexander, asked whether he condemned it or not. He sought to evade the question by appealing to a general council, but was convicted of heresy, excommunicated, and deposed.
He wrote a treatise, now lost, against St Ambrose’s *De fide*. Some fragments of certain polemical treatises published by A. Mai in *Scriptorum veterum nova collectio*, III, Rome, part 2, pp. 208-39, seem to be attributable to P.