Siena, a city in Italy’s central Tuscany region, is distinguished by its medieval brick buildings. The historic center of Siena has been declared by UNESCO as a World Heritage Site. It is one of the nation's most visited tourist attractions. Renowned for the Palio, a horse race held twice a year in the Piazza del Campo, the city's main square, Siena is also famous for its cuisine, art, museums, and medieval cityscape. The city's cathedral, the Duomo di Siena, is an exemplary Gothic building with a treasure trove of artworks and a strikingly striped black and white interior. Another significant site includes the Torre del Mangia, a tall bell tower with expansive views of the city and the surrounding Tuscan countryside. Siena's architecture, much of which dates back to the 12th to 15th centuries, has withstood the test of time, and the city layout follows the contours of three hills, creating a unique and picturesque townscape.