Byzantine Empire (330-1453)

In 330 AD, Emperor Constantine the Great moved the capital of the Roman Empire to Constantinople (modern-day Istanbul). What began as the Eastern Roman Empire developed into the Byzantine Empire — a Greek-speaking Christian civilization lasting over a thousand years that shielded Europe from the Arabs and later the Turks.

For Greece, Byzantium meant cultural continuity: The language remained Greek, the church was Greek Orthodox, and art and architecture merged ancient with Christian elements. The Byzantine churches with their golden mosaics, icon walls, and domed structures are still the defining architectural legacy — from the monasteries of Meteora to the churches of Thessaloniki (UNESCO World Heritage) to the monasteries on Athos.

The Crusades brought a traumatic experience: In 1204, the knights of the Fourth Crusade did not conquer the Holy Land but Constantinople — and ruthlessly plundered the Christian capital. The Byzantine Empire fragmented; France, Venice, and Genoa divided large parts of Greece among themselves. The Frankish castles on the Peloponnese (Mystras, Monemvasia, Methoni) bear witness to this time.

In 1453, Constantinople fell to the Ottomans under Sultan Mehmed II — the end of the Byzantine Empire and a date deeply embedded in the Greek collective memory. Thousands of Greek scholars fled to Western Europe and significantly contributed to the Renaissance.