If one place defines Siena, it is Piazza del Campo. Laid out in the 13th century, it was designed as the beating heart of the city. What had once been a marshy, unhealthy patch of ground was transformed, thanks to an ambitious civic project and enormous investment, into a monumental square that proclaimed Siena’s strength in the face of its rivals, especially Florence. Its design is unique: a great shell divided into nine sections, recalling the Council of Nine who ruled the city at the height of its power. Stand here and you’ll notice how the square slopes gently inward, like a natural amphitheater, perfectly shaped to host public gatherings. And what gatherings! Twice a year the Campo becomes the stage for the Palio, the legendary horse race that ignites the passions of the entire city. We’ll return to it later, since it deserves far more than a brief mention. Even today the square remains a spectacular setting, serving as the finish line for the Strade Bianche, a professional cycling race across Tuscany’s white gravel roads, famed for its beauty as much as its difficulty. Facing the Palazzo Pubblico, look for the Cappella di Piazza, an elegant white marble chapel erected in the 14th century after the devastation of the Black Death. Dedicated to the Virgin Mary in gratitude for lives spared, it has been reworked over the centuries, blending Gothic and Renaissance touches, and now stands as a delicate spiritual presence within this civic space. With its harmony and breathtaking beauty, Piazza del Campo ranks among the most remarkable squares in the world.