Constantine established Constantinople as a new power center.

Evidence

On the world stage, Constantine proceeded to mark his victory over Licinius in the most extraordinary way by establishing Constantinople (Constantinopolis = ‘Constantine City’), the ‘New Rome’. — Stephen Kershaw, A Brief History of the Roman Empire, 1558

Categorization

• corroborated: 2 independent passages support this claim — Stephen Kershaw, A Brief History of the Roman Empire, 1558