The walls were built during the 12th century, when control over the Centre of Gavorrano was divided between the Bishops of the new diocese of Grosseto and the family Alberti of Mangona.
During the 14th century the defensive structure was restored by Siena that strengthened it with some watchtowers. In the second half of the 17th century part of the existing boundary wall was degraded.
In the second half of the last century a series of restorations made a discreet retrieval of the medieval walls.