Saint Liberius the Confessor, Bishop of Rome, became Bishop of Rome in the year 352, after the death of Pope Julius. Saint Liberius was a fervent proponent of Orthodoxy against the Arian heresy and a defender of Saint Athanasius of Alexandria (May 2). The emperor Constantius (337-361) was inclined to side with the Arians, but was not able to compel Saint Liberius to condemn Saint Athanasius. For such intransigence he was sent off to prison in Beroea (Thrace), but was soon returned to his see on the insistent petitions of the Roman people.
Before his return, they summoned Saint Liberius to the Semi-Arian Council of Sirmium, where they forced him to sign the acts of the Council. Saint Liberius deeply repented of this later, and labored much at Rome on behalf of Orthodoxy. He died peacefully in the year 366.