The castle of Poppi is the main monument of Casentino. Unlike all the other castles and medieval architecture in the area, it has not been ruined by time and men as it has always been used as a residence of the local political or administrative power, in fact it is still the seat of the Municipality of Poppi. Since its origins, the history of the castle is closely linked to that of the largest feudal family of the Casentino that put Poppi at the centre of its great properties and inhabited this manor for almost four hundred years: the Counts Guidi.