4th–11th centuriesReputable sourceWell documented
The Gold Solidus: Byzantium's Coin
On the timeline · around 4th–11th centuries ·
What happened
Introduced by Constantine in the early 4th century, the Byzantine gold coin — the solidus or nomisma — held its weight and purity almost unchanged for some 700 years. Trusted from western Europe to India, it functioned as the medieval world's dollar: the standard against which other currencies were measured. Only in the 11th century was it debased, before Alexios I Komnenos replaced it in 1092.
Why it matters
The rock-solid solidus underpinned Byzantine wealth and diplomacy for centuries, letting the empire pay armies, buy off enemies, and dominate Mediterranean trade. Its long stability is one of the great achievements of pre-modern economic history.
Sources
- World History Encyclopedia. Byzantine Coinage · Reputable source
Related timelines
- History of Money → — The medieval world's most trusted coin