Optatus

Optatus of Milevis, also called Optatus Milevitanus, was a bishop of Milevis (Milevum) in Numidia in Roman North Africa during the fourth century. The town is identified with modern Mila in Algeria. Contemporary and near-contemporary writers give almost no information about his origin, education, or the date of his consecration. Jerome, in his catalogue of Christian authors composed near the end of the fourth century, describes him simply as an African bishop of Milevis who wrote against the Donatist party. The years of his birth and death are not recorded in any surviving ancient source, and later traditional dates are conjectural.

His principal and only securely authentic work is a treatise against the Donatists, commonly known as Against the Donatists or On the Donatist Schism. It was first issued in six books, most likely in the middle 360s, as a reply to Parmenian, the Donatist bishop of Carthage. A seventh book was added in a later revision, often placed in the 380s. Donatism had divided the North African churches since the aftermath of the Diocletianic persecution, when disputes over clergy who had handed over the scriptures (traditores) produced a rival hierarchy that claimed to be the pure Church of the martyrs. Optatus argued that the true Church is Catholic, that is, spread throughout the world, and that the Donatists, confined largely to Africa, had broken unity. He maintained that the sacraments do not depend on the personal worthiness of the minister, and he distinguished schism, a rupture of communion, from heresy, a corruption of doctrine, classifying the Donatists as schismatics.

A notable feature of the work is a list of the bishops of Rome from the apostle Peter down to the pontiff of Optatus's own time, offered as evidence of unbroken apostolic succession and of communion with the Roman see as a mark of the Catholic Church. He also appealed to the geography of the Church, to the practice of the whole Christian world, and to scripture. Augustine of Hippo later praised Optatus as a Catholic bishop of memorable authority and developed similar lines of argument in his own anti-Donatist writings. The treatise of Optatus is therefore both a primary source for the history of the Donatist controversy and an early witness to Roman episcopal succession and to fourth-century African ecclesiology. Other works have occasionally been ascribed to him, but modern scholarship generally accepts only the anti-Donatist books as genuine.

Optatus is venerated as a saint in the Catholic Church. The Roman Martyrology commemorates him on 4 June, describing him as bishop of Milevis who opposed the Donatist schism with the authority of the sacred writings. No ancient passio or reliable account of his death and burial survives, and no well-attested local cult or patronage is documented beyond this liturgical commemoration. His importance in Christian history rests on his role as a leading Catholic voice in Numidia during the Donatist crisis and on the survival of his treatise, which influenced later African theology and remains a fundamental document for the study of the fourth-century Church in North Africa.