[citation needed] The Palazzo is behind the Piazza del Plebiscito on via Monte di Dio, the road leading up to the height of the Pizzofalcone peak.
It was built in 1730 by the architect Ferdinando Sanfelice, also responsible for the construction of the nearby Nunziatella, the Bourbon Military Academy founded in the days of the Kingdom of Naples, and still in operation.
In the 19th century, that collection was sold to the 2nd Earl Spencer; the part which he retained is located today at the John Rylands Library, Manchester.
[2][3] The dual portals of the palace entrance, on the via Monte di Dio, open onto twin curved stairways leading up over an octagonal courtyard.
Gennaro, the prince of Cassano, fought for the Neapolitan Republic, and was handed over to Bourbon authorities by Admiral Horatio Nelson, who betrayed an agreement he had made with the revolutionaries.