Case file · Apparition / miracle
Constantine's vision before the Milvian Bridge
Before defeating Maxentius at the Milvian Bridge on 28 October 312, Constantine reportedly saw a cross of light above the sun with the words 'by this, conquer' (Eusebius), or was told in a dream to mark his soldiers' shields (Lactantius).
312 CE · 41.94, 12.47 · status: account
The sceptical view
Eusebius heard it from Constantine years later; a solar halo with crossing arcs is a common natural explanation.