Having restored the unity of the Empire, and, being in the course of major governmental reforms as well as of sponsoring the consolidation of the Christian church, he was well aware that Rome was an unsatisfactory capital.
Setelah memulihkan kesatuan kekaisaran, dan karena sedang melakukan reformasi besar dalam pemerintahan serta mensponsori konsolidasi masyarakat Kristen, dia sungguh-sungguh sadar akan keterbatasan Roma sebagai sebuah ibu kota.