Medieval Money: How the Gold Florin Rebuilt Europe's Economy

For most of the early Middle Ages, Western Europe ran on a single coin: the silver penny. Charlemagne's reforms around 800 CE set the system — 240 pennies to a pound of silver, divided into 12 shillings of 20 pennies each. Britain kept those exact ratios until 1971.

Gold essentially disappeared from Western European circulation for five centuries. Trade was local, coins were small, and large payments meant sacks of pennies or bars of silver weighed out on scales.

Why gold came back in 1252

By the 1200s, Italian merchants were moving goods worth far more than mule-loads of silver could conveniently carry. Genoa and Florence both struck gold coins in 1252; Florence's florin — about 3.5 grams of nearly pure gold, stamped with St. John the Baptist and the city's lily — became the standard.

Venice answered in 1284 with the ducat (later called the zecchino), which held its weight and purity so reliably for over 500 years that it became the trusted coin of Mediterranean and Levantine trade.

The bankers behind the coins

• Bills of exchange let a merchant deposit florins in Florence and collect local currency in Bruges — no coin had to travel
• Double-entry bookkeeping, refined in Italian city-states, made complex credit networks auditable
• The Medici bank (1397–1494) ran branches across Europe and briefly made the family the effective rulers of Florence
• Church bans on lending at interest pushed finance toward exchange contracts and partnerships — workarounds that became modern banking

What a florin could buy

In the 14th century a florin was roughly a week's wage for a skilled Florentine craftsman — perhaps $500–700 in modern spending power. A modest house in Florence might cost 100 florins; a fine warhorse, 50 or more. Wages roughly doubled after the Black Death (1347–1351) killed a third of Europe's workers, one of history's clearest examples of labor scarcity raising pay.

The legacy

The florin and ducat proved that a trusted coin, honestly minted, could underwrite an entire continent's commerce for centuries — the same lesson Constantine's solidus had taught a thousand years earlier, and the same one the Roman denarius taught by failing. Modern reserve currencies live or die by exactly that rule.