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.
A single mention of his poem, the De rerum natura (which from the condition in which it has reached us may be assumed to have been published posthumously) in a letter of Cicero's to his brother Quintus, written early in S4 B.C., confirms the date given by Donatus as that of the poet's death.
Donatus, in mentioning the poet's death, gives no hint of the act of suicide.
Besides the Institutions Lactantius wrote several treatises: (I) De Ira Dei, addressed to one Donatus and directed against the Epicurean philosophy.
The tradition was continued in the 4th century by Nonius Marcellus and C. Marius Victorinus, both Africans; Aelius Donatus, the grammarian and commentator on Terence and Virgil, Flavius Sosipater Charisius and Diomedes, and Servius, the author of a valuable commentary on Virgil.
Donatus taught him grammar and explained the Latin poets.
The interior is spacious and contains some fine 14th-century sculptures, those of the high altar, which contains the tomb of St Donatus, the patron saint of Arezzo, being the best; very good stained-glass windows of the beginning of the 16th century by Guillaume de Marcillat, and some terra-cotta reliefs by Andrea della Robbia.
About the middle of the same century grammar had a far abler exponent at Rome in the person of Aelius Donatus, the preceptor of St Jerome, as well as the author of a text-book that remained in use throughout the middle ages.
Virgil is the main authority quoted in Remi's Commentary on Donatus, which remained in use until the Renaissance.
Ro, the right reading habitior, " more portly," has been preserved to us by Donatus, an ancient commentator on Terence (Eunuchus, 2.2.
Besides the Virgilian commentary, other works of Servius are extant: a collection of notes on the grammar (Ars) of Aelius Donatus; a treatise on metrical endings (De finalibus); and a tract on the different metres (De centum snetris).
Donatus, a spacious episcopal palace, and higher up is a tower, the Belvedere, with a fine view.
He was the author of editions of several classical authors, of which the most important were: the complete works of Cicero (2nd ed., 1869-1874); Clement of Alexandria (1831-1834); Euripides (1841-1867), in continuation of Pfiugk's edition, but unfinished; Terence (1838-1840), with the commentaries of Donatus and Eugraphius.