The hall is dominated by a complex vault on which Ignatius Perricci painted a great fresco called the Allegory of Rome (1884) to celebrate the consecration of the city as the capital of a united Italy. Perricci, artist and decorator, was born in Monopoli in 1837. For the first part of his life he worked mainly in Naples, decorating private villas, churches and the offices of the institutions of the Kingdom of the Two Sicilies. Later in his life, he started working in Rome and Turin.