This work is composed by the African church father, Vigilius, against Palladius of Ratiaria, the 4th century Arian Christian theologian.In 381 AD, he was deposed from his office, together with Secundianus of Singidunum, at the Council of Aquileia, because of his Christological views. He had appealed to Theodosius, the emperor of the east, for intervention and to support the Arianist cause. This proved to be fruitless politically. Palladius' own writings are lost, but this polemic against his claims has survived to the present day.