Outside the Cathedral of Siena

Siena Cathedral

Cattedrale Metropolitana di Santa Maria Assunta
1196 FOUNDED
830 YEARS OLD
3h EXPLORATION

Step into the Duomo di Siena and you enter a world where time seems to stand still amidst an overwhelming display of artistic mastery. This architectural jewel, adorned with striking black and white striped marble, represents the pride and spiritual heart of Siena. Every corner of the cathedral holds a treasure, from the intricate narrative floor that changes with the light to the breathtaking sculptures crafted by masters like Michelangelo and Donatello. The unfinished façade of the Duomo Nuovo stands as a silent testament to the bold ambitions of a city that once dreamed of building the largest cathedral in Italy. Visitors often find themselves craning their necks to gaze up at the dizzying heights of the interior, where the celestial blue vaults meet an endless parade of papal portraits. It is a place that rewards those who slow down and look closely, offering a profound connection to the centuries of devotion and craftsmanship that forged this Italian wonder.

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History of Siena Cathedral

The story of the Siena Cathedral is one of unbridled ambition born from a fierce rivalry. In the medieval period, Siena was locked in a constant power struggle with its neighbour, Florence. The Sienese wanted a symbol of their dominance and piety that would make the world gasp. They looked at their existing cathedral and decided it simply was not grand enough. Their solution was to build a new one, the Duomo Nuovo, that would turn the existing structure into a mere transept of a colossal new building. This was a project of insane scale and confidence, reflecting the economic power and arrogance of a city at its zenith. However, history had a different plan. The grand vision collided with the devastating reality of the 1348 plague. As the Black Death swept through the city, claiming countless lives, the economy crumbled, and the labour force vanished. The grand expansion project was abandoned mid-construction, leaving behind the stark, towering wall that locals call the Facciatone. This structure remains a poignant monument to human ambition, showing just how close Siena came to creating an architectural feat that would have dwarfed almost everything else in Italy. The failure to complete the vision paradoxically preserved the original, more intimate, and exquisitely detailed Gothic masterpiece we see today. Over the following centuries, the cathedral became a canvas for the greatest artists of the age. Because it was never fully finished to the initial massive plan, later generations focused on enriching the interior. They installed the incredible marble floor, commissioned Michelangelo, Pinturicchio, and Donatello to fill the nooks and altars with masterpieces, and integrated the cathedral into the very fabric of Sienese life. Today, it stands not just as a religious site, but as a living diary of the city. When the Palio is won, the cheers of the winning contrada echo within these walls as they sing their thanks, ensuring the cathedral remains the beating heart of Siena, just as its builders originally intended.

Events spanning 239 years

YEAR 1220

The First Stone

While records are scarce, the construction of the current cathedral officially began around this year, building upon an older site.

YEAR 1260

The Battle of the Carroccio

The Sienese victory over their Florentine rivals at the Battle of Montaperti was celebrated with great fervor in the cathedral, cementing the city's pride and piety.

YEAR 1339

The Expansion of the Duomo Nuovo

Siena attempted to transform their cathedral into the largest church in the Christian world, intending to use the existing building as only the transept of a massive new structure.

YEAR 1348

The Plague Stops Progress

The catastrophic outbreak of the Black Death halted all work on the ambitious cathedral extension, leaving behind the massive, unfinished wall known today as the Facciatone.

YEAR 1459

Elevation to Metropolitan Status

Pope Pius II elevated the diocese of Siena to the status of an archdiocese, officially cementing the cathedral's title as a Metropolitan seat.

Fun Facts

  • It houses a rare and beautiful bronze statue of Saint John the Baptist sculpted by Donatello in 1455.
  • Michelangelo was hired to carve statues for the Piccolomini Altar, but he abandoned the project to focus on his growing fame in Florence.
  • Nicola Pisano's pulpit, located inside the cathedral, is considered a foundational masterpiece that helped spark the Italian Renaissance in sculpture.
  • The Libreria Piccolomini, found inside the cathedral, contains frescoes by Pinturicchio that are so remarkably preserved they appear to have been painted yesterday.
  • The abandoned Duomo Nuovo project was so large that the intended nave would have been larger than the current cathedral itself.
  • The cathedral floor is covered in 56 elaborate marble panels depicting biblical scenes and allegories, created by over 40 artists across several centuries.
  • The cathedral holds the Gate of Forgiveness, which features a marble relief of the Madonna by Donatello.
  • The cathedral is the spiritual finish line for the Palio horse race, where the winning contrada goes to sing a prayer of thanks.
  • The distinctive black and white marble stripes that decorate the cathedral are a direct reference to the colours of the Sienese coat of arms.
  • The interior cornice features 171 busts of popes; famously, the sequence jumps a number because of the legend of the female Pope Joan.

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