Construction works of the building were started by architect Vincenzo Sinatra in 1746, drawing inspiration from some French palaces of the 17th century.

At the beginning of the 1930s, on the occasion of the official visit of Umberto and Maria Josè of Savoy, Princes of Piedmont, the hall was restored by the painter Gregorietti.

The central painting on the vault, attributed to Antonimo Mazza, was made in 1826, and depicts an allegory of Ducezio, king of the Siculi, to whom an officer of the Engineers shows the site of Neas on Mount Alveria.

The Hall of Mirrors is the city's reception room, and continues to host illustrious delegations and prestigious events, such as the signing of the memorandum of understanding between the Eight UNESCO Municipalities for the creation of the cultural district.

This is an oval-shaped hall furnished with Louis XV-style furniture and large mirrors carved by Avoli artist Sebastiano Dugo.