Constantine the Great, the first Christian emperor of Rome,
declared that the Roman Empire would be "neutral" regarding religious worship
in his Edict of Milan.
summoned Christian bishops to a council in the city of Nicaea which resulted in
the declaration that Jesus was the son of God and the acceptance of the Trinity.
founded the city of Byzantium as a rival political, economic, and cultural center
to Rome in the eastern Mediterranean.
All of the above statements complete the sentence.