Piazza della Cisterna is a piazza (plaza) in San Gimignano, Italy. The pavement is brick and the piazza is surrounded by houses, workshops, taverns and medieval towers. The piazza was used as a market and a stage for festivals and tournaments. Its current layout dates from the thirteenth century.
In the middle there is an octagonal travertine well that gives the name to the square. The well was built in 1273.
In the dark ages, criminals were executed here.