This mosaic is probably one of the oldest surviving depictions of Christ. It comes from a Roman villa in Dorset. Christ is portrayed as a fair-haired and clean-shaven man wearing a tunic and cloak.
On Oct. 28, 312—17 centuries and a couple months ago—the armies of two rival Roman emperors clashed at the Battle of the Milvian Bridge just outside Rome. One of the leaders was Constantine, and ...