Thirteenth-century boundaries that surround streets paved in
travertino, stairways in stone, buildings where worked
generations of artists and then the towers, that characterize the
urban profile of the city: San Gimignano is an extraordinary
example of medioeval urban planning, protected since 1282 from a law that prohibited the demolition of the ancient buildings if in order not to construct more beautiful of it.
On the triangular Piazza della Cisterna and on Piazza del Duomo lean out jewels of architecture medioeval.
One for all the Collegiata romanesque, anthology of the most beautiful names of the Three hundred senese and the Four hundred Florentine.
The Palazzo del Popolo preserves one "Maestà" of Lippo Memmi, it replies of that senese by Simone Martini.
Other wonder the Church of Sant'Agostino with the cycle of the Gozzoli on the life of the Saint; later the Pollaiolo painted there the "Incoronazione of Maria and Saints."