Constantine the Great By MaddyHawira 272 Constantine was born 311 Galerius died 311 Civil war erupted. Maxentius emperor of Rome 312 Constantine approached Rome 312 Constantine had a dream to fight under the Christian Cross 313 Constantine became a Christian 313 Signed Edict of Milan 324 Constantine defeated Licinius 324 Constantine became the Emperor of united Rome 330 Constantinople established 337 Constantine died