Pope from 337. In the Arian struggle he was a supporter of orthodoxy, sheltering Marcellus of Ancyra and Athanasius. In 342–3 he convoked the Council of Sardica, which pronounced Athanasius the rightful occupant of his see. Because of the appellate jurisdiction allowed by the Council to Julius as Bp. of Rome, his name became famous in connection with the rise of the Papal claims. Feast day, 12 Apr.