What Even Is the Byzantine Empire? Busting the 'Mysterious Eastern Empire' Myth

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When you hear the phrase “Byzantine Empire,” you might picture a shadowy, Greek-speaking, Orthodox Christian state that had nothing to do with the toga-wearing, aqueduct-building Romans you learned about in middle school. You might even think it was a separate “Eastern” empire that popped up after the Western Roman Empire fell apart in 476 CE. That’s one of the most stubborn myths in history — and it’s completely wrong. For 1,000 years, from 330 CE to 1453 CE, the state we now call the Byzantine Empire called itself the *Basileia Rhomaion*: the Empire of the Romans. Its citizens called themselves *Rhomaios*: Romans. It was not a new country. It was the Roman Empire, plain and simple, with a new address.

To understand why this myth exists — and why it matters — we have to start with the decision that created this “new” capital: Emperor Constantine I’s choice to build a brand-new seat of power on the site of a tiny, 1,000-year-old Greek colony called Byzantion, perched on the narrow strait separating Europe and Asia. That decision didn’t split the Roman Empire in two. It saved it.

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Constantine’s Gamble: Why a New Capital Meant a New Start for Rome, Not a New Country

By the early 4th century CE, the Roman Empire was in trouble. For 50 years, it had been torn apart by the “Crisis of the Third Century”: constant civil wars, barbarian invasions, economic collapse, and plagues that killed 1 in 3 people in some regions. The empire’s borders stretched from the Atlantic coast of Morocco to the Persian Gulf, from the hills of Scotland to the deserts of Egypt — a territory so massive it was almost impossible to defend or govern from a single capital in Rome, a city located on the western edge of the empire, 1,500 miles from the wealthy eastern provinces of Egypt, Syria, and Asia Minor.

Constantine, who became sole emperor in 312 CE after winning a civil war, knew he needed a capital that was easier to defend, easier to supply, and easier to use to control both the European and Asian halves of the empire. He didn’t pick a random spot. He chose Byzantion, a small but strategically perfect settlement on the European side of the Bosporus Strait, the narrow waterway that connects the Black Sea to the Mediterranean Sea. The site had three massive advantages that made it the perfect new home for the Roman Empire: 1. It was centrally located. From Byzantion, Constantine’s government could send troops and messages to the Danube frontier in the north, the Persian frontier in the east, and the Italian peninsula in the west in half the time it took from Rome. 2. It controlled the empire’s most important trade routes. Every ship moving grain from the Black Sea to the Mediterranean, or silk from China to Europe, had to pass through the Bosporus. By controlling the strait, the new capital could tax all that trade, filling the imperial treasury with gold. 3. It was almost impossible to conquer. The site was surrounded by water on three sides, with only a narrow strip of land connecting it to the European mainland. Constantine built massive seawalls and a single, heavily fortified gate on that land side, making it far easier to defend than Rome, which had been sacked by barbarian armies three times in the previous 150 years.

Constantine didn’t just rename the city. He spent six years and the equivalent of billions of today’s dollars transforming Byzantion into a copy of Rome, with every symbol and institution of the old capital to prove it was not a new city, but the *new Rome*. He built a massive hippodrome (chariot racing stadium) just like the one in Rome, a Senate house identical to the Roman Senate, and even hauled tons of soil from the city of Rome to spread in the new city’s central forum, so it would literally be built on Roman ground. He moved statues of Roman gods and past emperors from Rome to the new capital, and even brought the altar of the goddess Victory from the old Roman Senate to the new one. In 330 CE, he officially dedicated the city as *Nova Roma*: New Rome. (Everyone just called it *Constantinopolis*, Constantine’s City, after him — a name that stuck until the Ottoman Empire conquered it in 1453 CE.)

For the people living there, this was not the founding of a new country. It was the Roman Empire moving its headquarters. The laws were the same, the currency was the same (Constantine even kept the old Roman gold *solidus* coin, which would remain stable for 700 years, longer than any other currency in history), the government structure was identical to Rome’s, and the emperor was still the *Augustus*, the supreme ruler of all Roman territories. The only difference was the zip code.

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The 1,000-Year Lie: Why Historians Invented the Word “Byzantine”

If the people who lived there called themselves Romans, and their state the Roman Empire, where did the word “Byzantine” even come from? The answer lies in 19th-century European historians’ bias against the Eastern Christian world.

For most of its history, the rest of Europe called the empire the “Roman Empire” too. Even after the Western Roman Empire collapsed in 476 CE, when the barbarian general Odoacer deposed the last Western emperor, Romulus Augustulus, the Eastern emperor in Constantinople, Zeno, refused to recognize Romulus as a legitimate ruler. He claimed the Western throne had been vacant for years, and that he was the sole rightful emperor of the entire Roman world. Western European rulers agreed — for a while. When the Frankish king Charlemagne was crowned “Emperor of the Romans” by the Pope in 800 CE, the emperor in Constantinople, Leo III, was furious. He refused to recognize Charlemagne’s title, calling him a usurper and a barbarian. For the next 600 years, the empire in Constantinople was the only state in Europe that claimed to be the Roman Empire, and almost everyone else agreed.

The name “Byzantine” first appeared in 1557, in a history book written by a German scholar named Hieronymus Wolf. Wolf was a product of the Renaissance, a movement that idealized the ancient Latin Roman Empire as the pinnacle of Western civilization. He and other Enlightenment-era scholars couldn’t wrap their heads around the idea that the “true” Roman Empire could be Greek-speaking, Orthodox Christian, and based in the East. To them, this state was a weird, Eastern offshoot of the real Roman Empire, not the real thing itself. So they dug up the ancient Greek name of the small colony Constantine had built his city on — Byzantion — and started calling the empire the “Byzantine Empire” to set it apart from the “real” Roman Empire of Caesar and Augustus.

The name stuck, especially after the Ottoman Empire conquered Constantinople in 1453 and ended the state entirely. European scholars had no reason to call it the Roman Empire anymore, since there was no Roman Empire left, so “Byzantine” became the standard term. But it’s important to remember: no one who lived in the empire between 330 and 1453 ever called themselves Byzantine, or their state the Byzantine Empire. It’s a label invented by later scholars to separate the Eastern Roman Empire from the Western one they idolized — a label that has stuck around even though modern historians now widely reject it as biased and inaccurate.

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Why the Eastern Roman Empire Survived When the Western One Didn’t

If the Byzantine Empire was just the Roman Empire with a new capital, why did the Western half collapse in 476 CE while the Eastern half lasted another 1,000 years? The answer comes down to three key differences between the two halves of the empire, all of which were obvious to people living at the time: 1. Economic strength. The Western Roman Empire’s economy relied on slave-based agriculture in Italy and Gaul (modern France), which had been in decline since the 2nd century CE. By the 4th century, the West was so poor it could barely pay its armies, and it relied on barbarian mercenari