Piazza della Cisterna is a piazza in San Gimignano, Italy. It has a triangular shape with a slight natural slope and is connected to the nearby Piazza del Duomo by an open passage. The pavement is brick and the piazza is surrounded by houses and medieval towers. There are presently 5 towers onto the square or very near it and the bases of other five are visible on the facade of the various palaces, plus one, the Ridolfi tower, which is no longer in existence having collapsed in 1646 onto the family palace, which divided the square in two alongside the short axis, thus making this relatively small area a concentrate of medieval architecture. In the south-west corner, the piazza meets the Arc of Becci,, an ancient city gate. The arc is flanked by the massive rectangular towers of Becci on the left and Cugnanesi on the right.