Theodosius I

Theodosius I (Greek: Θεοδόσιος Theodósios; 11 January 347 – 17 January 395), also called Theodosius the Great, was Roman emperor from 379 to 395. During his reign, he succeeded in a crucial war against the Goths, as well as in two civil wars, and was instrumental in establishing the creed of Nicaea as the orthodoxy for Christianity. Theodosius was the last emperor to rule the entire Roman Empire before its administration was permanently split between two separate courts (one western, the other eastern).