The Arch of Constantine By maxburns 272 Constantine's Birth 306 The Civil Wars of the Tetrarchy begin 306 Constantine becomes emperor of Rome 312 Constantine defeats Maxentius at the Battle of Milvian Bridge 313 Constantine proclaims religious freedom in the Roman Empire 315 The Arch of Constantine is built Built sometime in the year 315, an exact day could not be found. 324 The Civil Wars of the Tetrarchy end when Constantine defeats Licinius 337 Constantine's Death
