Built towards the end of the thirteenth century, perhaps on an unfinished construction of Swabian origin, its forms reflect Frederick's models.
The building was inhabited until the beginning of the seventeenth century, while in the eighteenth century the rooms of the kitchens on the sides of the ogival portal were used as a prison (during the nineteenth century those on the left were used as a criminal prison and those on the right as a civil prison. they left numerous graffiti on the walls.
A crenellated tower that was located in the southwest corner of the external enclosure, mentioned in 1611, was renovated around 1820 and was demolished for the construction of the palace of Giuseppe Cafisi in the 1840s, together with a large Gothic portal ("portal greater"); at the same time the large cistern in the center of the enclosure was covered with pavement.
In the sixties of the twentieth century the enclosure was deprived of the western section, from the southern wall of the castle to the new post office (1963).
Source: wikipedia