From Roman to Byzantine: The World After Constantine

By the fourth century, the Roman monetary system had already changed dramatically. The old denarius was long gone. The great bronze sestertius had disappeared. Late Roman coinage was dominated by bronze denominations and the gold solidus introduced under Constantine. That solidus became the foundation of Byzantine money.

The Eastern Roman Empire inherited the late Roman monetary system, but over time it transformed it into something distinct: a currency built around stable gold, clearly valued bronze coins, and increasingly Christian imperial imagery.

Anastasius and the Great Bronze Reform

The clearest starting point for Byzantine coinage is the reign of Emperor Anastasius I, who ruled from AD 491 to 518. Before Anastasius, small bronze coins were often confusing and difficult to value. Around AD 498, he introduced a major reform that created a clearer bronze system. This reform is one of the most important moments in Byzantine numismatic history.

The genius of the reform was simple. Each bronze denomination carried a large Greek letter on the reverse that told you its value in nummi, making the system unusually friendly to anyone who could not read the full inscription.

These large value marks make early Byzantine bronze coins unusually approachable for new collectors. Even if you cannot read the full inscription, you can often understand the denomination immediately.

Justinian and the Golden Age of Byzantine Bronze

Under Justinian I, who ruled from AD 527 to 565, Byzantine bronze coinage became larger, heavier, and more impressive. Justinian's large folles are among the most iconic Byzantine coins. Many show a facing imperial portrait on the obverse and a large denomination mark on the reverse.

Justinian's reign also saw the reconquest of North Africa, Italy, and parts of Spain. His coins circulated during one of the last great attempts to restore the Roman world.

Gold: The Solidus, Semissis, and Tremissis

While bronze was used for everyday transactions, gold remained the heart of Byzantine power.

The Solidus

The solidus was the main Byzantine gold coin. It had already been introduced under Constantine, but under the Byzantines it became one of the most trusted currencies in the world. For centuries, it maintained a strong reputation for weight and purity. Gold solidi were used for major payments, diplomacy, taxes, military expenses, and international trade. They are beautiful, historically important, and usually expensive today.

The Semissis

The semissis was worth half a solidus.

The Tremissis

The tremissis was worth one third of a solidus. These smaller gold denominations were especially important in the late Roman and early Byzantine world. Today, tremisses are often more available than full solidi, though still usually far more expensive than bronze coins.

Silver: The Missing Middle

One thing that surprises many new collectors is that Byzantine silver coinage was not as central as Roman silver had been. The Roman denarius had once been the backbone of the empire. In the Byzantine period, however, the monetary system relied primarily on gold for large transactions and bronze for everyday commerce. Silver played a smaller role than it had during the Roman Empire. Early Byzantine rulers continued striking denominations such as the siliqua and miliarense, inherited from the late Roman monetary system. Later emperors introduced silver coins such as the hexagram and miliaresion.

The Hexagram

The hexagram was a silver coin introduced under Heraclius in the seventh century. It appeared during a time of enormous crisis, when the empire was fighting for survival against Persia and later the expanding Islamic caliphates. For collectors, the hexagram is historically fascinating because it belongs to one of the most dramatic periods in Byzantine history.

The Miliaresion

Introduced in the eighth century, the miliaresion became one of the most important silver denominations of the middle Byzantine period. Many examples feature elegant inscriptions and Christian symbolism, reflecting the increasingly religious character of Byzantine coinage.

Heraclius and the Age of Crisis

Heraclius ruled from AD 610 to 641, and his reign marked a turning point. The old Roman world was changing rapidly. The empire fought a devastating war against Persia, then faced the sudden rise of Islam. Provinces that had been Roman for centuries, including Syria, Egypt, and much of North Africa, were lost.

His coins often show him alongside his sons, emphasizing dynasty, legitimacy, and continuity during a period of extraordinary upheaval. By this point, Byzantine coinage was becoming more openly medieval in appearance. The classical realism of earlier Roman portraiture was gradually giving way to a more symbolic, religious, and front-facing style.

Christ Appears on Byzantine Coins

One of the most important developments in Byzantine coinage came under Justinian II, who ruled first from AD 685 to 695 and again from AD 705 to 711. Justinian II placed an image of Christ on the gold solidus. This was a major turning point. Earlier Roman emperors had used gods, personifications, victories, and imperial portraits. Byzantine rulers increasingly presented themselves not simply as political leaders, but as Christian emperors ruling under Christ.

For collectors, these coins are among the most historically important in all Byzantine numismatics. They show how far Roman coinage had traveled from the pagan imagery of the Republic and early Empire.

The Anonymous Folles: Coins of Christ

In the late tenth and eleventh centuries, a remarkable series of bronze coins appeared. These are known today as the Anonymous Folles. Instead of naming the reigning emperor, many feature Christ on the obverse. The reverse often carries religious inscriptions rather than a traditional imperial portrait. These coins are popular with collectors because they are usually affordable, visually striking, and deeply connected to the Christian identity of the Byzantine Empire. For many beginners, an Anonymous Follis is one of the best first Byzantine coins.

Why Byzantine Coins Look Different

New collectors are often surprised by Byzantine coins. Compared to the realistic portraits of Augustus, Hadrian, or Marcus Aurelius, Byzantine coins can appear abstract, stylized, or even crude. This was not necessarily a sign of declining artistic skill. Byzantine art increasingly emphasized symbolism, faith, and imperial authority over realistic portraiture.

Rather than capture an emperor's exact appearance, engravers sought to communicate religious and political messages.

The result was a style that feels very different from classical Roman coinage but perfectly reflects the medieval world Byzantium helped create.

The Scyphate Coins: Cup-Shaped Byzantine Money

By the middle Byzantine period, many coins began to take on a distinctive cup shape. Collectors often call these coins scyphate, meaning cup-shaped. The most famous examples include later histamena and the various trachy denominations that dominated middle and late Byzantine coinage. These coins can look unusual to new collectors, but they are part of what makes Byzantine numismatics so fascinating. They demonstrate that Byzantine coinage did not simply preserve Roman traditions. It continued to evolve.

The cup shape may have strengthened the coin, helped distinguish denominations, or served other practical purposes. Scholars continue to debate the exact reason.

Alexius I and the Great Medieval Reform

By the eleventh century, the Byzantine monetary system had weakened significantly. Gold purity had declined, the monetary system had become increasingly complicated, and the empire faced military, political, and economic pressure. Emperor Alexius I Comnenus, who ruled from AD 1081 to 1118, introduced a major reform around AD 1092.

The Hyperpyron

The hyperpyron became the empire's new high-value gold coin. It effectively replaced the debased descendants of the old solidus and helped restore confidence in Byzantine currency. Alexius's reform stabilized the monetary system and supported the empire during the age of the Crusades. For collectors, coins of Alexius I are fascinating because they stand at the crossroads of Byzantium, the Crusader states, and the medieval Mediterranean world.

The Late Byzantine Period: A Shrinking Empire

After the Fourth Crusade captured Constantinople in AD 1204, the Byzantine world fractured. The empire was restored in 1261, but it was never the same. Byzantine territory shrank, wealth declined, and the coinage became increasingly modest. Late Byzantine coins are often small, crude, and difficult for beginners to read. Yet historically, they are powerful artifacts.

They belong to the final centuries of an empire that had survived the fall of the Western Roman Empire, the rise of Islam, the Crusades, civil wars, and centuries of external pressure. When Constantinople fell to the Ottomans in AD 1453, more than two thousand years of Roman state history came to an end.

Which Byzantine Coins Are Best for Beginners?

If you are just starting out, Byzantine coins can be surprisingly approachable.

Gold solidi, tremisses, and hyperpyra are historically important, but they are usually much more expensive. Bronze is where most beginners should start.

Why Byzantine Coins Matter

Byzantine coins are not just a footnote to Roman history. They are the continuation of Roman coinage into a Christian, Greek-speaking, medieval world. They show us the transformation of the ancient world into the Middle Ages. They preserve the faces of emperors, the image of Christ, the power of Constantinople, and the long memory of Rome.

For collectors, Byzantine coins offer something remarkable: a bridge between Julius Caesar and the Crusades, between pagan Rome and Christian empire, between the ancient and medieval worlds. The Roman Empire did not simply disappear. It changed. And its history was still being minted for nearly a thousand years.

History wasn't just written. It was minted.