Did You Know? Italy
Imagine two wealthy Tuscan cities, separated by roughly 50 miles, competing for territory, trade, political influence, and prestige.
That was medieval Tuscany. Florence and Siena became fierce rivals during the Middle Ages, and their rivalry was about much more than simply being neighboring cities.
Siena grew wealthy through banking, trade, and its position along the Via Francigena, an important pilgrimage and trade route connecting northern Europe with Rome. Florence, meanwhile, was becoming a major center of commerce and manufacturing.
Both cities wanted influence over Tuscany. Their political differences added fuel to the rivalry. Siena generally supported the Ghibelline cause, associated with the Holy Roman Emperor, while Florence became strongly associated with the Guelphs and the papacy. The conflict eventually produced one of the most famous battles in medieval Italian history: the Battle of Montaperti, fought on September 4, 1260.
The battle took place along the Arbia River outside of Siena. Florence heavily outnumbered the Sienese forces. Knowing they lacked the numbers for a direct assault, they divided their forces. They launched an initial assault at the center of the Florentine forces before hitting the flanks. Florentine forces were battling more than just the Sienese army. They faced betrayal from within. During a critical moment, Bocca degli Abati, a Florentine noble secretly loyal to the Ghibellines, rode up to the Florentine standard-bearer and cut off his hand. The falling flag triggered panic and confusion among the Guelph ranks. Their lines collapsed, and as they retreated, the Sienese forces turned the battlefield into a slaughter so intense that Dante Alighieri later described it in the Inferno as the carnage that “dyed the Arbia red.”
The victory temporarily made Siena the dominant military power in Tuscany. After the defeat, exiles led by Farinata degli Uberti, re-entered Florence and established control. Following the victory, Ghibelline leaders at the Council of Empoli proposed razing Florence to the ground. Farinata degli Uberti stood alone in opposition and defended the city from destruction.
Dante later remembered the battle in his Divine Comedy. In the Inferno, he encounters souls associated with the political and military world of his time, including Farinata degli Uberti (Inferno, Canto X) and the traitor Bocca degli Abati (Inferno, Canto XXXII).
But medieval rivalries rarely stayed settled.
Florence eventually recovered. In 1269, the Florentines defeated Siena at the Battle of Colle Val d’Elsa. The Sienese forces led by Provenzano Salvani marched on Colle Val d’Elsa to suppress the Guelph stronghold and secure trade routes along the Via Francigena. Expecting little resistance, a coordinated surprise attack was launched by the Guelphs, causing chaos. Salvani, the supreme leader of Siena who had orchestrated the victory at Montaperti, was unhorsed, captured, and decapitated on the field by his enemy Regolino Tolomei. Seeing his head raised on a lance, the Sienese army panicked and fled.
The devastating defeat crippled the Sienese military and forced Siena to accept a pro-Guelph government, ending the era of Ghibelline supremacy across Tuscany.
The rivalry also found its way into architecture and civic pride. Florence built its enormous cathedral complex. Siena responded with an equally ambitious vision for its cathedral, including plans for an extraordinary expansion that would have transformed it into one of Europe’s largest churches. The project ultimately failed, leaving the unfinished walls that can still be seen today.
Even their public spaces became symbols of civic identity. Siena’s Piazza del Campo became one of Italy’s most remarkable medieval squares, while Florence developed its own extraordinary civic center around Palazzo Vecchio.
Their rivalry helped create two very different — but equally fascinating — visions of medieval Tuscany. And perhaps the greatest irony? The competition between Florence and Siena helped produce some of the artistic and architectural treasures that make Tuscany famous today.
If you could spend a day in medieval Tuscany, would you choose Florence or Siena? What would you want to see?
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