Three palaces — Salimbeni, Tantucci, and Spannocchi — joined around a small square at the head of Banchi di Sopra, all serving as the headquarters of Monte dei Paschi di Siena, founded in 1472. The 14th-century Palazzo Salimbeni at the centre, with its Gothic three-light windows, is the most architecturally interesting.
A statue of the Sienese economist Sallustio Bandini stands in the middle of the piazza. The square is occasionally open for art exhibitions; otherwise it is best appreciated from outside.