Each cell has a double barred window and double wooden doors reinforced in iron with large bolts. At least two prisoners could be kept in each cell. The prison was also used in the early 1920's and it is from that period that most of the prisoners scribbles and drawings inside the cells date. Two of the cells were reserved for female prisoners who had to be kept separate from the men.

Recent restoration work inside the prison has revealed another layer of graffiti from a much earlier period. The flaking plaster has been carefully removed in places to finally bring back to the light images with a religious content ... images of The Madonna and St. Christopher, the Patron Saint of Barga . Experts are still working on trying to pinpoint a precise date for when the prisoners used the walls as their canvas and diary.