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 deep and 5,6 meters in diameter - completely unusual compared to the normal characteristics of the water reserves of the Etruscan era, suggest that the artifact was conceived as a cistern. Going through a medieval passageway it is possible to enter the well and use it thanks to a modern walkway from which you can observe the imposing monument. On the base of the covering are legible alphabetic signs, analogous to those found engraved in some blocks inserted in the city walls.
A system of stairs - an architectural masterpiece - allows you to go down to the deepest point. The upper part, originally almost 5 meters lower, is covered with travertine blocks; the roof is made with two imposing beams, each made up of five monolithic ashlars, which in turn support travertine slabs.
Curiosity: Originally, the upper edge of the well was 4,5 meters lower, at the square level.