 Almost nothing is known about the life and the episcopate of Theodorus.His episcopate was marked with the seizure of power in Italy by the first Barbarian king, Odoacer (476), followed by the invasion of the Ostrogoths of Theodoric the Great in 488–490.According to the writings of Ennodius, bishop of Pavia in the 6th-century, in such difficult times Theodorus demonstrated to be a man of great firmness and wit, a firm leader for the oppressed population of Milan.