Golden light glints off the massive dome of the Hagia Sophia, a monument to a city that held the world in its grip for over a thousand years. While the Western Roman Empire faltered in the 5th century, the East endured, anchored by Constantinople and a profound sense of Roman identity.

Constantine I forged this new capital in 324, shifting the heart of the empire toward the Hellenistic East. Later, in 395, Theodosius I cemented Christianity as the state religion, setting the cultural foundation for an empire that would call itself Roman, even as the world around it changed.

The 6th century brought a brief, brilliant expansion under Justinian I, who codified Roman law in the Corpus Juris Civilis and reconquered swathes of Italy. Yet, the 541 plague and relentless Persian wars exposed the fragility of an empire stretched to its breaking point.

By the 7th century, the rise of the Arab Rashidun Caliphate stripped away Syria and Egypt, forcing the Byzantines to retreat into an Anatolian core. To survive, they adopted the theme system, creating a militarised society that defended its borders with Greek fire and tactical resilience.

The Macedonian dynasty brought a two-century renaissance of learning and military power, peaking with Basil II. His decisive victory at the Battle of Kleidion in 1014 crushed the Bulgarians, yet the empire’s internal political instability soon invited the Seljuk Turks to shatter its defences at Manzikert in 1071.

The 1204 sack of Constantinople by the Fourth Crusade proved the most devastating blow, fragmenting the state into competing rump states. Though the Palaiologos dynasty reclaimed the capital in 1261, the empire was reduced to a regional shadow of its former self.

The final curtain fell on 29 May 1453, as the forces of Sultan Mehmed II breached the walls of Constantinople. The last emperor, Constantine XI, died in the fighting, and with him, the final vestige of the ancient Roman world was extinguished forever.