For this purpose, the hill known as “il Tondo,” located behind the Church of San Giuseppe, was leveled, and in its place the palace was erected, its façade dominating Viale Regina Margherita, the grand boulevard destined to become the city’s main ceremonial street. The building is an imposing two-story structure. The simple and austere façade is topped by the city’s coat of arms, carved in white stone.
Inside, a majestic courtyard surrounded by forty monolithic gray granite columns leads to the palace’s grand staircase and to the council hall, both designed by engineer Luigi Greco.
The building houses several works of art, including two busts by Michele Tripisciano and a large painting by Salvatore Frangiamore, a painter from Mussomeli. Also noteworthy is the Prefect’s private apartment, richly decorated in the Art Nouveau (Liberty) style.