The Museo dell'Opera del Duomo is located in Siena, Italy, and is dedicated to the conservation of religious artworks and artifacts from the Siena Cathedral (Duomo di Siena). Housed in the 14th-century Palazzo del Duomo, the museum is renowned for its collection of Renaissance art. It holds a rich array of sculptures, frescoes, paintings, and other masterpieces by notable artists such as Giovanni Pisano, Duccio di Buoninsegna, and Donatello. One of its most famed pieces is Duccio's exquisite 'Maestà,' a large altarpiece originally made for the cathedral. Additionally, the museum features the 'Panorama dal Facciatone,' where visitors can climb the 'Facciatone,' part of an unfinished extension of the cathedral, to enjoy breathtaking panoramic views of Siena and its surrounding landscape. The works displayed play a critical role in illustrating the religious, cultural, and artistic history of the region.