The Palazzo Tantucci is a Renaissance style (more specifically Mannerist) urban palace localized on Via dei Montanini, on the Piazza Salimbeni, in the Terzo di Camollia, in the city of Siena, region of Tuscany, Italy. To the palace's right is the Gothic facade of the Palazzo Salimbeni, and across the Piazza with Sallustio Bandini's statue is the Classic Renaissance facade of the Palazzo Spannocchi. All three palaces are owned now by the Monte dei Paschi di Siena, one of the oldest banks in Europe, which arose in the Salimbeni palace.