Lonely Planet review
This former hospital, parts of which date to the 13th century, was built as a hospice for pilgrims travelling the Via Francigena. Located opposite the duomo, its highlight is the upstairs Pellegrinaio (Pilgrim's Hall), with vivid 15th-century frescoes by Lorenzo Vecchietta, Priamo della Quercia and Domenico di Bartolo lauding the good works of the hospital and its patrons.
The building now functions as a cultural centre and houses three museums – the Archaeological Museum, Art Museum for Children and Center of Contemporary Art (SMS Contemporanea) as well as a variety of historic halls, chapels and temporary exhibition spaces. Don't miss the atmospheric Archaeological Museum housed in the basement tunnels and the medieval fienile (hayloft) on level three, which houses Jacopo della Quercia's original Fonte Gaia sculptures.