Theodosius I

Theodosius I (Latin: Flavius Theodosius Augustus; 11 January 347 – 17 January 395), also known as Theodosius the Great, was Roman Emperor from AD 379 to AD 395. Theodosius was the last emperor to rule over both the eastern and the western halves of the Roman Empire. On accepting his elevation, he campaigned against Goths and other barbarians who had invaded the Empire; he failed to kill, expel, or entirely subjugate them, and after the Gothic War they established a homeland south of the Danube, in Illyricum, within the empire's borders. He fought two destructive civil wars, in which he defeated the usurpers Magnus Maximus and Eugenius at great cost to the power of the Empire.

He also issued decrees that effectively made orthodox Nicene Christianity the official state church of the Roman Empire. He neither prevented nor punished the destruction of prominent Hellenistic temples of classical antiquity, including the Temple of Apollo in Delphi and the Serapeum in Alexandria. He dissolved the order of the Vestal Virgins in Rome. In 393, he banned the pagan rituals of the Olympics in Ancient Greece. (It was not until the end of the 19th century, in 1896, that the Olympics were held again.) After his death, Theodosius' young sons Arcadius and Honorius inherited the East and West halves respectively, and the Roman Empire was never again re-united, though Byzantine Emperors after Zeno would claim the united title after Julius Nepos' death in 480 AD.

Roman emperor

The Roman emperor was the ruler of the Roman State during the imperial period (starting in 27 BC). The emperors used a variety of different titles throughout history. Often when a given Roman is described as becoming "emperor" in English, it reflects his taking of the title augustus or caesar. Another title often used was imperator, originally a military honorific. Early Emperors also used the title princeps. Emperors frequently amassed Republican titles, notably princeps Senatus, consul and Pontifex Maximus.

The legitimacy of an emperor's rule depended on his control of the army and recognition by the Senate; an emperor would normally be proclaimed by his troops, or invested with imperial titles by the Senate, or both. The first emperors reigned alone; later emperors would sometimes rule with co-Emperors and divide administration of the Empire between them.

The Romans considered the office of emperor to be distinct to that of a king. The first emperor, Augustus, resolutely refused recognition as a monarch. Although Augustus could claim that his power was authentically Republican, his successor, Tiberius, could not convincingly make the same claim. Nonetheless, for the first three hundred years of Roman Emperors, from Augustus until Diocletian, a great effort was made to emphasize that the Emperors were the leaders of a Republic.