In Ponterotto, in the valley between the left shore of river Pesa and the hill’s slopes, were brought to light, from under the alluvial deposit, a series of structures belonging to buildings of different chronology and function, abandoned for catastrophic events and deprived from all the reusable materials until the level of the roof of foundation.
With the sorting material of the ancient structures were realized, between the end of XV and the XVIII century, a series of drainages to drain the area of the spring waters.
The drainages did cut the structures belonging to an Etruscan Hellenistic building (II century BC), probably arisen with function of manufacture-dryhouse-warehouse for bricks. Near it, under a modern washing trough, which continued using the same spring, was found a quadrangular basin of the lower Middle Age which stays over a stratigraphy which goes from II century BC to the first imperial age.
In the lower part of the site, by the channel left tributary of the Elsa, have been found the structures belonging to a farm or to pars rustica of a roman villa with stages of construction and destruction that goes from I-II to VI century AC. Of this last period is also a little necropolis.
The area of Ponterotto appears so long frequented since antiquity thanks to the abundance of spring waters and of fertile earth, moreover of very fine clay, called “mattaione”, apt to the construction of brick and baked clay furnishings.