Emperor Justinian is identified as one of the greatest Caesars to ever reign in Europe during his reign from 527 to 565, during which he managed to make reviving Roman authority throughout its growing Byzantine Empire. As emperor of the Byzantine Empire in the 6th and 7th centuries, he conquered many parts of Europe, once again restoring control of Roman authority, if only for a time. This essay will show to what extent Justinian succeeded to Roman authority. Although many depictions can be disputed, a closer look can show that through enormous military successes, architectural activities that changed the value of the Empire and improved Constantinople as the center of the Christian world, and the Legal work of the "Code of Justinian" helped Justinian. revive Roman authority. In the 7th century, the Byzantine Empire collapsed, which was defeated and taken over by the Ottoman-Turkish Empire east of Constantinople. This essay will discuss the reasons for the decline of such a powerful empire, hit by the "Justinian plague" and which ultimately deteriorated after Justinian's death. This saw the end of any last element of any Roman authority in Europe.Military TriumphsDuring Justinian's reign, he was able to conquer and seize many areas of Europe, expanding his Byzantine Empire, which was a huge beginning in the revival of Roman authority. It took over a huge amount of territory that had once belonged to the Roman Empire before the barbarian invasions of the 4th and 5th centuries in Western Europe, notably North Africa and Italy. Justinian's extensive war against the Persians east of Constantinople was a problem for Justinian, but after several battles a peace was reached on fairly equal terms. Justinian then middle of paper......lusion Justinian's reign was that of a successful vision in which he revived Roman authority across the Byzantine Empire through different campaigns to "retake" what was once a Roman territory in the 5th century. By doing this, as well as due to the "abnormal" losses caused by the plague and the damage caused to economic and military prospects, the Byzantine Empire was no longer economically able to defend its states and ultimately fell when Constantinople was conquered by the Ottoman Turks. The extent to which Justinian revived Roman authority during his reign was astronomical and allowed him to be described as one of the greatest Caesars of the medieval period. But thanks to the events that took place to gain Roman authority, losses in financial power and population diminished and Byzantium rapidly declined after the death of Justinian and Roman authority was lost forever..