This man replaced the aur
This man replaced the aureus coin with the solidus to suppress inflation. After having his wife killed in a hot bath, this man attempted to erase all records of that wife, Fausta, from existence. This man briefly allied with Licinius before defeating him at the battles of Hellespont and Chrysopolis. Before another battle, this man had a vision which convinced him to place a chi-rho symbol on his soldiers' shields. He defeated Maxentius at the Battle of Milvian Bridge and put the Edict of Milan into law, legalizing a religion he had earlier converted to. For 10 points, name this first Christian Emperor of Rome.