Religious buildings in Siena

The Piccolomini Library, located within the Siena Cathedral, is a significant historical site dedicated to the life of Pope Pius II. The library was established by his nephew, Cardinal Francesco Piccolomini, who was also the Bishop of Siena. The library houses precious book collections of the humanist Pope, Enea Silvio Piccolomini, who passed away in 1464. The library's entrance is from within the cathedral itself.

The Museo dell'Opera Metropolitana del Duomo is a museum located in Siena, Italy. It is dedicated to preserving the works of various artists who have contributed to the city's rich cultural and artistic heritage over the centuries. These works were created for the dome, baptistery, and oratory of San Bernardino, some of the city's most significant architectural landmarks.

The Oratory now serves as the Diocesan Museum of Sacred Art of Siena. It showcases a collection of works from the Sienese school, dating from the 13th to the 17th century. These works provide a comprehensive overview of the artistic evolution in Siena during this period.