For 10 points, name this sixth-century Byzantine emperor who married the escort Theodora and constructed the Hagia Sophia.
This man appointed John the Cappadocian to manage his empire's tax collection. Protesters chanted Nika after this ruler initially refused to spare two murderers who had belonged to the Blue and Green Demes. Procopius' (*) Secret History of this man painted the ruler as a literal demon capable of taking off his own head. In 538 CE, this man's general Belisarius annexed Rome. For 10 points, name this sixth-century Byzantine emperor who married the escort Theodora and constructed the Hagia Sophia.
This man appointed John the Cappadocian to manage his empire's tax collection.
Justinian I