Interior of Hagia Sophia in Istanbul
Topic guide

Byzantine Empire

The eastern Roman Empire from late antiquity to the fall of Constantinople.

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Overview

The Byzantine Empire was the eastern Roman Empire, centred on Constantinople and governed in Greek for much of its history. Its people normally understood themselves as Romans.

Imperial survival depended on diplomacy, taxation, armies, fortified cities and religious authority as borders repeatedly changed.

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The essential guide

01

Rome in the east

Constantinople became an imperial capital in the fourth century. Justinian's sixth-century conquests and law code expressed Roman universal claims.

02

Faith, court and society

Orthodox Christianity shaped political legitimacy, art and conflict. Iconoclasm, monasticism and relations with Rome and neighbouring churches generated debate.

03

Crusade and conquest

The empire recovered from repeated crises, but the Fourth Crusade captured Constantinople in 1204. A restored state survived until Ottoman conquest in 1453.

04

Rome after antiquity

The people now called Byzantine generally understood their state as the Roman Empire. The modern label is useful but can conceal continuity in law, government and political identity.

Court histories need to be balanced with archaeology, seals, coins, church records and sources produced by neighbouring societies. Religious controversy was also political and social rather than purely theological.

Chronology

Key dates

  1. Constantinople dedicated

    Constantine established a new imperial capital.

  2. Justinian's reign

    Law codification, building and reconquest marked the period.

  3. Iconoclast controversies

    Imperial religious policy contested sacred images.

  4. East–West schism

    A long process of division acquired a symbolic date.

  5. Fourth Crusade

    Crusaders captured and looted Constantinople.

  6. Byzantine restoration

    Michael VIII recovered the capital.

  7. Ottoman conquest

    Mehmed II ended the empire.

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Questions and debates

Why call the empire Byzantine if its people called themselves Roman?

How did religion structure imperial power?

Why did Constantinople survive so many crises?

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Essential stories

Begin with the foundations, then move into the events, people and debates that add detail and complexity.

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Sources and further reading