The Siena Cathedral is a magnificent example of Italian Romanesque-Gothic architecture located in the historic city of Siena, Tuscany, Italy. Construction began in the 12th century and continued over several centuries, resulting in a rich blend of artistic styles. The cathedral is renowned for its stunning black-and-white striped façade, intricate marble floors, and masterpieces by artists such as Michelangelo, Donatello, and Bernini.