Answer:
He supported the building of the Hagia Sophia.
Step-by-step explanation:
Justinian I, one of the greatest emperors of Byzantine Empire who ruled from 527–565 AD, is known for his great administrative skills and inclination towards the Christian Orthodoxy.
Justinian's paramount accomplishment was his support that help rebuild Hagia Sophia between 532 to 537 AD. He always had a determination to influence church and Christian policies.
Justinian 1 was born to peasant parents and it was his uncle who had raised him up to be an emperor. His wife, Empress Augustus, played a significant role in helping him achieve great accomplishmets and influenced his actions considerably.