Miltiades was pope when Constantine issued the Edict of Milan ... Remember that a decade earlier, the Empire was in the throes of the Diocletian Persecution, the last but rather severe persecution ...

So, he decided to split his rule among a fellow augusti Maximian, who ruled in the West while Diocletian himself remained ...

He brought some political stability to Rome during his reign but having failed to cure it of hyperinflation, Diocletian later retired to become a cabbage farmer. When the emperor Constantine (306 ...