The architectural structure of the castellated tower of the tallest building of Poggiarello gives rise to the hypothesis that its construction was in the early Medieval era during the second half of the XIII century (1250 ca.), as is confirmed by a land registry assessment in 1387 by the “contrado”, (the surrounding rural area of Sovicille (Suavis Locus Ille), containing a report of the existence of a “terram vineatam et sode cum casalino positam al Poggiarello” and therefore not only a rural settlement but also an agricultural environment with vineyards as the early evidence of a natural interest in winemaking in this place.

A further structure is attributed to this period made of of agricultural buildings subdivided into small farms, referred to in the testamentary disposition of assets of Prince Agostino as quote “… the Villa of Poggiarello with its palace and tower built entirely in stone and fortified in keeping with the style of this period, but with creature comforts, befitting the home of the owner, such as storerooms for conserving any sort of produce or possessions, a courtyard, a square, hen-coop, chapel, and other outside areas, as well as areas of fallow land surrounding the aforementioned small farms, dams and property, in part currently worked under feudal law and in part dedicated to the cultivation of the owner’s vineyards, some dedicated vineyards and some narrow strips of densely planted vines called “anguillacci”