Optatus wa Milevi alikuwa askofu wa Milevi, huko Numidia, katika karne ya 4; anakumbukwa hasa kwa maandishi yake bora dhidi ya Parmenianus na wafuasi wengine wa Donato Mkuu. Optatus alikuwa ameongokea Ukristo, alivyoandika Augustino wa Hippo, labda baada ya kuwa mtaalamu wa kuhubiri Mpagani. Tangu kale Optatus anaheshimiwa na Kanisa Katoliki kama mtakatifu. Sikukuu yake huadhimishwa tarehe 4 Juni. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko Mababu wa Kanisa St. Jerome (De viris illustribus, # 110) tells us it was in six books and was written under Valens and Valentinian (364-75). We now possess seven books, and the list of popes is carried as far as Siricius (384-98). Similarly the Donatist succession of antipopes is given (II, IV), as Victor, Bonifatius, Encolpius, Macrobius, Lucianus, Claudianus (the date of the last is about 380), though a few sentences earlier Macrobius is mentioned as the actual bishop. The plan of the work is laid down in Book I, and is completed in six books.