UNESCO World Heritage Site. It’s an 18th-century royal palace with an adjoining park, commissioned by Charles of Bourbon, king of Naples and Sicily, designed by Luigi Vanvitelli.

The grandiose complex has a vast octagonal vestibule adorned with twenty Doric columns, from which on the right and left are inserted the passages leading to the inner courtyards while on the front we find a triple porch.

Instead, to the left of the vestibule there is access to the actual apartments.
The first room is that of the Halberdiers, followed by that of the bodyguards furnished in Empire style and embellished with twelve bas-reliefs. The next room is named after Alessandro il Grande and called "baciamano", is located in the center of the main facade and serves as a hallway between the Appartamento Vecchio and the Appartamento Nuovo.

The Appartamento Vecchio, on the left, was the first to be inhabited by Ferdinando IV and his wife Maria Carolina, composed of a series of rooms with walls covered in silk from the San Leucio factory. The first four rooms, of conversation, are dedicated to the four seasons.