Constantine's Battle of the Milvian Bridge in AD 312 and its historical interpretation by Eusebius have played a big role in people's image of this ruler and his impact on the Christian church. For those who lived in the fourth century, this battle was just one in a list of imperial victories. In this article the author wants to understand the unique hagiographical perspective of Eusebius and he examines the available historical sources to determine a full picture of the historical events of that famous battle.