Julian: Byzantine emperor from 361 to 363, also known as "the Apostate". He was half-brother of Constantine the Great and he received classical education at Nikomedeia and Athens. In 361 he succeeded Constantius and one of his first activities was the restoration of paganism. His conflict with the Church was severe, however an end was given by his mysterious death in 363 during his expedition in Persia.
Justin I: Emperor (518-527). Son of a poor peasand, he asceded to the throne of Constantinople after a succesfull military carrier. He signed a peace treaty with the Persians but in 526 he began an unsuccesful campain against them. In the religious policy, he mannaged to give an end to the theological conflict by condemning the Monophysitism. It is generally believed that the actual administrator of the empire was his nephew Justinian, who was educated and young in age.
Justin II: Byzantine emperor from 565 to 578. He was nephew of Justinian I. His foreign policy was unsuccessful and led to territorial losses both at the East and the West. Domestically, he did not stood out either.