 Almost nothing is known about the life and the episcopate of Magnus.Magnus lived under the Arian king Theodoric the Great, who probably at first supported him, but later persecuted him as had already happened for the philosopher Boethius.What is known is the text of his funeral epitaph, transmitted us by Goffredo da Bussero (13th century), which describes Magnus as a man of great charity who helped the prisoners of war.