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272
Constantine is born
Constantine is born Flavius Valerius Constantinus in the city of Naissus around February 27, 272. His father, Flavius Constantius, is a skilled politician, soldier, and bodyguard to Emperor Aurelian. His mother, Helena, is of low social rank. -
293
Constantius is made Caesar under Emperor Diocletian(March 1, 293).
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303
Constantine witnesses the "Great Persecution."
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305
Diocletian and Galerius concurrently abdicate as emperors
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311
Galerius ends the persecutions of Christians
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312
Constantine takes the sigil of the Christian cross in battle
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313
Constantine agrees to the Edict of Milan
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330
Constantine renames Byzantium Constantinople
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337
Constantine dies