Perhaps present at the Synod of Ancyra (Angora), in a.d. 315. Died, a.d. 374. Marcellus played the man at Nicæa, and was accused by the Arians of Sabellianism, and deposed. He was distrusted as a trimmer, but could boast “se communione Julii et Athanasii, Romanæ et Alexandrinæ urbis pontificum, esse munitum” (Jer. de vir. ill. c. 86). Cardinal Newman thinks Athanasius attacked him in the IVth Oration against the Arians. Vide Dict. Christ. Biog. iii. 808.