description Emperor Theodosius I Overview
Theodosius I was Roman emperor from 379 to 395 and the last emperor to govern both the eastern and western parts of the Roman Empire before they were again divided between separate rulers. The Edict of Thessalonica, issued under Theodosius and his co-emperors in 380, endorsed Nicene Christianity as the imperial standard of Christian orthodoxy. He also defeated rival emperors in civil wars and established the Theodosian dynasty.
help Emperor Theodosius I FAQ
When did Theodosius I rule?
Theodosius I was Roman emperor from 379 to 395. He is remembered as the last emperor to rule both the eastern and western parts of the Roman Empire during one reign.
What was the Edict of Thessalonica?
The Edict of Thessalonica was issued in 380 under Theodosius and his co-emperors and endorsed Nicene Christianity as the imperial religious standard. It marked an important step in the Roman government's support for Nicene doctrine.
Was Theodosius I the last emperor of a united Roman Empire?
He was the last emperor to govern both eastern and western imperial territories under a single imperial administration. After his death in 395, his sons Arcadius and Honorius ruled the eastern and western halves separately.
What is Theodosius I known for besides the Edict of Thessalonica?
Theodosius is also associated with suppressing pagan public practices and non-Nicene Christian movements, although implementation varied across the empire. His reign included major conflicts such as the civil war that ended with the Battle of the Frigidus in 394.
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