Why might Justinian be considered a successful emperor? Why might he be considered a failure?

Justinian is considered a successful emperor because he was able to restore the Roman Empire to its former glory. He was able to reconquer much of the former Roman territories, codify Roman law, and build great monuments such as the Hagia Sophia. He also made Constantinople a major center of culture and learning.

Justinian is also considered a failure because he was unable to maintain control of the reconquered territories, and his wars of reconquest were costly and ultimately unsuccessful. He also failed to address the economic and social problems of the empire, leading to a decline in its power and influence.