Built in 1845 to house the town hall, it was later purchased by Vincenzo Giunta and Mariannina Musso, who in 1926 entrusted the architect Vincenzo Arangio with the renovation of the building, which was completed in 1928. Together with the town hall, it is one of the most significant examples of Liberty architecture in the town. A listed property since 1978, the following year it was purchased by the municipality, which used it as the headquarters of the municipal video library and library, before the latter was moved to Villa Tedeschi. In February 2022, the renovation works began and, at the same time, it was used as the site of a social gathering centre.
The building was built on a project by the engineer Vincenzo Arangio, di Rosolini, and by the master builder Clemente Gugliotta. It consists of a ground floor and a first floor and is characterized by the prevalence of classic architectural features and the insertion of Liberty-style decorative elements. The south-east and north-east elevations, the latter overlooking a small garden, are motivated by the deep loggia on the ground floor, supported by columns with composite capitals. Corresponding to the loggia, on the first floor there is a large terrace where elegant wrought iron railings were once clearly visible. On the south-east front, overlooking the square, the central opening is highlighted by the elegant arched frame, including a rose window executed in high relief.
The municipal library was housed inside the Giunta Musso palace until 4 October 2009. From 5 October the library moved to Villa Tedeschi.