Asterius was one of the defenders of the Council of Nicæa and St. Athanasius.
[1] At the Council of Sardica, in 343,[2] Asterius denounced Arianism, as a heresy.
This led to his exile in Libya, at the command of Emperor Constantius II.
[3] In 362, he was restored to his position of Bishop of Petra, by Emperor Julian.
[4] Asterius attended the Council of Alexandria,[5] where he was chosen as the delegate to carry a letter to the Church of Antioch, where he provided a report of the proceedings at the council for the church leaders of Antioch.