PHŒBADIUS, fî-bê'di-us (FŒGADIUS, FITADIUS): Bishop of Aginnum, the modern Agen (73 m. s.e. of Bordeaux); d. after 392. He skilfully confuted the second Sirmian formula (see ARIANISM, I., iii., § 6) in southern Gaul by means of western orthodoxy, in his work Liber contra Arianos (in the latter part of 357 or in 358; MPL, xx. 13-20), a work clear, animated, and occasionally ironica1 in argument and admirable and impressive in style. The main thought is that if Christ is not God he is not real Son. Known after the beginning of the sixteenth century is a tract, De fide orthodoxa contra Arianos (MPL, xx. 31-50) with an attached confession of faith, with which Phœbadius has been generally credited. At the Synod of Rimini in 359, Phœbadius obstinately defended orthodoxy, but finally with Servatio of Tongern was made to yield. These two bishops at a certain stage of the synod produced special formulas, "in which first Arius and all his unbelief are condemned, and secondly, the Son of God is not only pronounced to be equal with the Father but also without beginning." Phœbadius took part in the synods of Valence and Saragossa (380), and was still living in 392.