Rev. Alban Butler (171173). Volume VIII: August. The Lives of the Saints. 1866.
SS. Donatus, Bishop of Arezzo in Tuscany, and Hilarinus, Martyrs
BEING illustrious for sanctity and miracles, as St. Gregory the Great assures us, he was apprehended by Quadratianus, the Augustalis, or imperial prefect of Tuscany, in the reign of Julian the Apostate. Refusing to adore the idols, he suffered many torments with invincible constancy, and at length finished his martyrdom by the sword in 361. His relics are enshrined in the cathedral of Arezzo. At the same time and place St. Hilarinus, a monk, received the like crown, being beaten to death with clubs. His relics were afterwards translated to Ostia. See the Martyrologies.