"Flavius Claudius Julianus, or Julian the Apostate, ruled Rome as sole emperor for just a year and a half, from 361 to 363, but during that time he turned the world upside down. Although a nephew of Constantine the Great, the first Christian emperor of Rome, Julian fought to return Rome to the old gods who had led his ancestors to build their vast empire. As emperor, Julian set about reforming the administration, conquering new territories, and reviving...