What year was the peak of the byzantine empire under Justinian?

The peak of the Byzantine Empire under Justinian I occurred around the year 565 AD. During his reign from 527 to 565 AD, Justinian sought to restore the empire's former glory, expanding its territories and implementing significant legal reforms, most notably the Corpus Juris Civilis. This period is marked by military conquests, architectural achievements like the Hagia Sophia, and a flourishing of Byzantine culture.