When Did the Eastern Roman Empire Become the “Byzantine Empire”?

Event Summary:
The Eastern Roman Empire outlived its western counterpart by nearly 1,000 years. Its people called it the Roman Empire. The term “Byzantine Empire” only emerged centuries after its fall—crafted by later historians to draw cultural and chronological distinctions.

Byzantium Becomes Constantinople:
In 330 CE, Emperor Constantine I refounded the Greek city of Byzantium as Nova Roma—soon called Constantinople. It became the new capital of the Roman Empire and a center of administration, commerce, and Christian authority.

Fall of the Western Roman Empire (476 CE):
When Germanic forces deposed Romulus Augustulus in 476, the Western Roman Empire collapsed. The Eastern Roman Empire, ruled from Constantinople, survived and claimed full succession.

A Roman Empire in Greek Dress:
The Eastern Empire gradually adopted Greek language and Orthodox Christianity. Over centuries, Latin faded from law, liturgy, and governance. Yet emperors, citizens, and clergy still called themselves Rhomaioi—Romans.

The Word “Byzantine” Is Born—Later:
In the 16th century, scholars like Hieronymus Wolf introduced “Byzantine Empire” to distinguish it from classical Rome. They named it after Byzantium, the city’s name before Constantine. These scholars saw the Greek-speaking empire as separate—culturally and theologically—from the Latin West.

Why the Change in Name?
Western European historians, influenced by the Renaissance and Catholic tradition, sought to create a break between the “true” Roman past and the Orthodox East. The term “Byzantine” helped frame the empire as medieval, foreign, and exotic, not Roman.

Why It Matters:
The name “Byzantine Empire” is a modern construct. Its people never used it. They believed they were continuing Roman civilization. Understanding this distinction sharpens our view of continuity, identity, and historical framing across East and West.