History of the Roman Empire
Theodosius was the last Emperor who ruled over the whole Empire. After his death in 395, he gave the two halves of the Empire to his two sons Arcadius and Honorius; Arcadius became ruler in the East, with his capital in Constantinople, and Honorius became ruler in the West, with his capital in Milan and later Ravenna. The Roman state would continue to have two different emperors with different seats of power throughout the 5th century, though the Eastern Romans considered themselves to be the only ones who were fully Roman. Latin was used in official writings as much as, if not more than, Greek and the two halves were nominally, culturally and historically, if not politically, the same state.
Christian persecution of paganism under Theodosius I
In the year 392, Theodosius become Emperor of also the western part of the Roman Empire, the last emperor to rule over both. In the same year he officially began to proscribe the practice of paganism. This was when he authorized the destruction of many temples throughout the empire.