Il Etruscan well, also called Pozzo Sorbello, from the name of the noble family that owns the Palazzo above it, is an exceptional work of hydraulic engineering, datable to the second half of the III century BC originally conceived as the city's water reservoir, further evidence of the high degree of civilization reached by the Perugian community at that time.
The dimensions of the well - 37 meters of depth and 5,6 meters in diameter - completely unusual compared to the normal characteristics of the water reserves of the Etruscan period, suggest that the building was conceived as a cistern. Going through a tunnel dating back to the Middle Ages it is possible to enter the well and use it thanks to a modern walkway from which you can see the impressive monument. On the base of the covering are readable alphabetic signs, analogous to those that are engraved in some blocks inserted in the city walls.
A system of stairs - a masterpiece of architecture - allows you to go down to the deepest point. The upper part, originally lower than almost 5 meters, is covered with travertine blocks; the roof is made of two imposing beams, each made up of five monolithic segments, which in turn support travertine slabs.
Curiosity: Originally, the upper edge of the well was 4,5 meters lower, at the square level.