Theodosius I Dies and Divides the Empire for the Last Time
The last emperor to rule a united Rome splits it between his two young sons
Quick facts
- Died
- January 17, 395 CE, Milan
- Eastern heir
- Arcadius (age ~18)
- Western heir
- Honorius (age ~11)
- Result
- Permanent east-west division
What happened
Theodosius I had reunited the eastern and western halves of the Roman Empire after defeating the usurper Eugenius and his general Arbogast in 394 CE, making him the last emperor to govern the whole Roman world. When he died in Milan on January 17, 395 CE, his will split the empire between his two sons: eighteen-year-old Arcadius received the eastern provinces, with Constantinople as his capital, while eleven-year-old Honorius received Italy, Gaul, Hispania, Africa, and Britain in the west. Because both sons were too young to rule alone, guardianship of Honorius fell to the general Stilicho and guardianship of Arcadius to the praetorian prefect Rufinus, setting up rival power centers that competed rather than cooperated.
Why it matters
Unlike earlier splits of imperial authority, this division of 395 CE proved permanent. The eastern and western courts drifted apart in administration, military resources, and eventually language and culture, so that when the west collapsed in the following century, the eastern half survived as a separate, functioning state.
How we know
The succession is recorded in the Roman historical tradition and summarized in Livius.org's biographical entry on Theodosius I, which lists his death and the division between Arcadius and Honorius among the key events of 395 CE.
Sources
- Livius.org (Jona Lendering). Theodosius I · Reputable sourcelivius.org · The domain "livius.org" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- World History Encyclopedia. Map of the Roman Empire under Theodosius the Great, c.395 · Reputable sourceworldhistory.org · The domain "worldhistory.org" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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