For a comprehensive use of the term "ecclesiastical writers" he has the authority of Jerome, who enumerates among them 4 such heresiarchs or leaders of schism as Tatian, Bardaisan, Novatus, Donatus, Photinus and Eunomius.
The toleration edicts of Galerius and of Constantine and Licinius were published during his pontificate, which was also marked by the holding of the Lateran synod in Rome (313) at which Caecilianus, bishop of Carthage, was acquitted of the charges brought against him and Donatus condemned.
Our knowledge of the life of the celebrated Latin playwright, Publius Terentius Afer, is derived chiefly from a fragment of the lost work of Suetonius, De viris illustribus, preserved in the commentary of Donatus, who adds a few words of his own.
We have also a valuable commentary (newly edited by P. Wessner) on five of the plays, derived chiefly from Euanthius and Donatus (both of the 4th century), and another of less importance by one Eugraphius.
Donatus states in his life of Virgil, a work also based on the lost work of Suetonius, that Lucretius died on the same day on which Virgil assumed the toga virilis, that is, in the seventeenth year of Virgil's life, and on the very day on which he was born, and adds that the consuls were the same, that is Cn.