When is the Eastern Roman Empire shown on the map?

The border data draws the Eastern Roman Empire AD 395–632. The source samples borders at fixed dates, so a span can begin late or run on past the end.

How large was the Eastern Roman Empire?

At its greatest extent drawn on this map, the Eastern Roman Empire covered about 2.6 million km². That is the largest area the border data gives it across the years it is drawn, not necessarily its greatest extent in history.

Africa · Antiquity and Christian Nubia

Eastern Roman Empire

Empire · drawn on the map AD 395–632

See it on the map → Wikipedia ↗

Type: Empire
Shown on the map: AD 395–632
Peak area: 2.6M km²
Region: Africa

Overview

The Eastern Roman Empire was the eastern half of the Roman Empire as it existed from the permanent division of 395 AD (after the death of Theodosius I) until the Arab conquests of the 630s stripped it of Syria and Egypt — the period during which it ruled much of Mediterranean Africa. Its capital was Constantinople, founded by Constantine I on the site of Byzantium in 330; its citizens called themselves Romans (Rhomaioi) and their state simply the Roman Empire — "Byzantine Empire" is a later scholarly coinage.

History

The division of 395 gave the East the richer, more urbanized, and more populous provinces: Egypt, the granary of the Mediterranean, plus Syria, Asia Minor, and the Balkans. While the Western Empire succumbed to barbarian warlords by 476, the East survived thanks to its wealth, defensible capital, and able civilian administration under emperors such as Theodosius II (builder of the Theodosian Walls) and Anastasius I, whose financial reforms filled the treasury. The empire's African dimension reached its zenith under Justinian I (r. 527–565): his general Belisarius destroyed the Vandal Kingdom in 533–534 and restored North Africa as the Praetorian Prefecture of Africa, while Justinian's Corpus Juris Civilis codified Roman law and the Hagia Sophia embodied the empire's Christian culture. Egypt and the reconquered African provinces, governed later through the Exarchate of Africa (from c. 585), made the empire briefly Mediterranean-wide again.

The empire was officially Christian since Theodosius I, but its African provinces were religiously divided — Chalcedonian orthodoxy competed with Miaphysite (Coptic) faith in Egypt, Donatism in Numidia, and surviving paganism — tensions that weakened loyalty to Constantinople. Economically, African grain, Egyptian papyrus, and tax revenues underpinned the state; culturally, Alexandria remained a great center of learning.

Decline and legacy

Justinian's gains proved fragile: plague (541), exhausting Persian wars, and finally the Arab conquests of 634–642 took Syria, Palestine, and Egypt. Egypt fell by 642, depriving the empire of as much as three-quarters of its revenue; Africa held on until the fall of Carthage in 698. Thereafter the rump empire reorganized around Anatolia under the theme system. This early Eastern Roman phase left enduring African legacies: the Coptic and Nubian Christian traditions, the ruins of Byzantine Carthage, and the memory of Rome that later Islamic rulers called Bilād al-Rūm.

Common questions

What was the Eastern Roman Empire?: The Eastern Roman Empire was the eastern half of the Roman Empire as it existed from the permanent division of 395 AD (after the death of Theodosius I) until the Arab conquests of the 630s stripped it of Syria and Egypt — the period during which it ruled much of Mediterranean Africa.
When is the Eastern Roman Empire shown on the map?: The border data draws the Eastern Roman Empire AD 395–632. The source samples borders at fixed dates, so a span can begin late or run on past the end.
How large was the Eastern Roman Empire?: At its greatest extent drawn on this map, the Eastern Roman Empire covered about 2.6 million km². That is the largest area the border data gives it across the years it is drawn, not necessarily its greatest extent in history.
Who ruled the Eastern Roman Empire?: The division of 395 gave the East the richer, more urbanized, and more populous provinces: Egypt, the granary of the Mediterranean, plus Syria, Asia Minor, and the Balkans. While the Western Empire succumbed to barbarian warlords by 476, the East survived thanks to its wealth, defensible capital, and able civilian administration under emperors such as Theodosius II (builder of the Theodosian Walls) and Anastasius I, whose financial reforms filled the treasury.
How did the Eastern Roman Empire end?: Justinian's gains proved fragile: plague (541), exhausting Persian wars, and finally the Arab conquests of 634–642 took Syria, Palestine, and Egypt. Egypt fell by 642, depriving the empire of as much as three-quarters of its revenue; Africa held on until the fall of Carthage in 698.

Sources

Every source below was consulted while writing this entry.

Wikipedia – Byzantine Empire en.wikipedia.org/wiki/Byzantine_Empire

This entry was written from the sources above and last updated 10 September 2026.

This entry was researched and drafted with AI from the sources above, and has not been reviewed by a historian. How entries are made

Text available under CC BY-SA 4.0: reuse it with a credit to The World Through Time and a link to this page. Passages drawing on the Wikipedia articles listed above are also licensed CC BY-SA 4.0 by their contributors.

Border geometry for the map itself comes from Cliopatria v0.12 (Seshat Global History Databank, CC-BY-4.0).

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