The museum structure stands within the nave of the 'Duomo Nuovo,' an ambitious 14th-century expansion project abandoned after the 1348 plague.
The Maestà altarpiece by Duccio di Buoninsegna was painted on both sides; the museum displays it to allow viewing of the back panel narratives.
The statue of the Virgin and Child by Giovanni Pisano originally stood in the cathedral's central portal before being relocated for preservation.
The Facciatone terrace is built atop the incomplete south wall of the cathedral, which remains the highest point accessible to the public in the area.
Many of the museum's sculptures were transferred here in the 19th century to protect them from weathering.
The Museo dell'Opera Metropolitana is housed within the unfinished 'Duomo Nuovo' extension of the Siena Cathedral. It contains the original statues created by Giovanni Pisano for the cathedral facade, which were removed to protect them from environmental damage. The collection features Duccio di Buoninsegna's Maestà, the centerpiece of the museum's display on the first floor. The museum space utilizes the architecture of the 14th-century nave of the cathedral that was never completed due to the Black Death. Visitors can access the 'Facciatone' panoramic terrace, which offers elevated views over the Siena Cathedral and the city's Piazza del Campo. The museum also preserves significant liturgical objects, stained glass, and sculptural works spanning the 13th to the 15th centuries.
The Facciatone terrace, looking down over the Piazza del Campo and the surrounding Tuscan hills.
Purchase the 'OPA SI' cumulative ticket if you plan to visit the Cathedral, Baptistery, and Crypt as well.
Wear comfortable, non-slip footwear to climb the narrow, winding staircase leading to the Facciatone terrace.
Visit the museum early in your Siena itinerary to understand the artistic evolution of the cathedral itself.
Do not mistake the museum entrance for the main Cathedral entrance; they are separate buildings.
Open daily, but access to the Facciatone terrace may be restricted during periods of high wind or severe weather.
Modest dress is required as the building is connected to the cathedral; cover shoulders and knees.
