Theodosius I

Roman emperor from 379 to 395

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Lived 347–395, aged 48Spain

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Wikipedia
87 languages
Cross-language footprint
Rank in Spain
#210
Politicians
Era
347–395
Aged 48

Summary

Updated 2026-06-08

The last man to rule the whole Roman Empire. Theodosius settled the Goths inside imperial borders as allies rather than subjects, fixed Christian orthodoxy at Constantinople, then won two civil wars before dying in 395 — leaving his sons to split the map for good.

Biography

About

Born in Hispania in 347, son of a general executed under murky circumstances, Theodosius clawed back from forced retirement through court intrigue and was named eastern emperor in 379 after Valens fell at Adrianople. His depleted forces couldn't expel the Goths, so in 382 he let them settle south of the Danube as autonomous allies — a peace that held in his lifetime but seeded future trouble. He convened the First Council of Constantinople in 381, cementing the Nicene Creed as orthodoxy and Arianism as heresy, and married into the western dynasty to shore up his position. Twice he marched west…

Voice

In their own words

Sourced, dated quotes from Theodosius I

Theodosius I

saidundated

Brown, Peter, The Rise of Western Christendom, C.E.2003, pp. 73–74

Theodosius I

saidundated

King, N.Q. The Emperor Theodosius and the Establishment of Christianity. London, C.E.1961.

Theodosius I

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Caspari, Maximilian Otto Bismarck (C.E.1911). "Theodosius (emperors)" . In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 26 (11th ed.). Cambridge University Press.

Theodosius I

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