Witness to the Vision of the Cross
The tradition that a luminous cross appeared in the sky before Constantine's victory over Maxentius (312) is attested by Eusebius of Caesarea and Lactantius, though the accounts differ in details. Eusignius is among those named in hagiographic sources as having personally witnessed the phenomenon. His account, as preserved in Orthodox tradition, adds a soldier's testimony to the event that Constantine himself associated with his turn toward Christianity.