Justinian was the emperor of the Byzantine form of the Roman Empire. He restored much of its former territory and inaugurated a period of great prosperity and influence.
Justinian regained Italy, North Africa, and a small part of Spain. Whether it was worth the treasure expended is debatable. North Africa probably was since it was regained quickly, but Italy was ruined by a long drawn-out war. Bits of Italy remained under the emperor in Constantinople until 1071, and one of the 7th-century emperors died in Syracuse.
That Theodora was a courtesan in her earlier career could be a fabrication of her enemies (who were numerous). Procopius' Secret History is a great read even if it isn't altogether reliable. Think of Justinian and Theodora as Bill and Hillary, but with a lot more Arkancides.
Justinian was the emperor of the Byzantine form of the Roman Empire. He restored much of its former territory and inaugurated a period of great prosperity and influence. He left it bankrupt, overtaxed, and militarliy over extended. (Nope, no similarity to anything in sight)