The walls of the base of this tower, as of many other buildings of the ancient fortified village with similar characteristics, had a very wide thickness, up to two meters.
During the Second World War these spaces were used both as air raid shelters and as a shelter for displaced people in the surrounding area. There were many bombings because the nearby Passignano was a war target as it was the headquarters of the SAI, a factory which built single-seat fighter airplanes, and home to a famous school of aeronautical pilots.
The “Palazzaccio”, which is the historic building to the right of the tower, was the stately home of the Counts Guerrieri, one of the two noble families of landowners of Castel Rigone. This was of anti-papal faith, while the other family, the Marquis Bichi, was of papal faith. “Il Palazzaccio” owes this dark nickname to the fact that it was probably the building where Justice was administered, when Castel Rigone was an autonomous community. Nickname that is often found in Italy for buildings used for this purpose.