Constantine is a Roman Emperor who is best known for what?

He emerged victorious in the civil wars against emperors Maxentius and Licinius to become sole ruler of the Roman Empire by 324. As emperor, Constantine enacted administrative, financial, social and military reforms to strengthen the empire. He restructured the government, separating civil and military authorities.

Explanation:

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adopted the practice of proskynesis, a persian court custom that involved bowing down and kissing the hand of others, depending on their rank.