The atrium preserves the status of the works made during the Juvarrian period at the moment of their interruption. The restoration architect, Andrea Bruno, although aware of the original architectural plan thanks to a painting made by Marco Ricci and Massimo Teodoro Michela in the 18th century, decided not to complete it. On the north side of the Castle, the robust pillars conceived by Juvarra dominate, while on the porphyry pavement, the marble and stone slabs mark the positions of the uprights and the directions of the spans that were never realized. The imposing Castle wall has supports for unfinished decorations, niches intended for statues and large openings that evoke the great spaces projected by the Sicilian architect. In the higher part is a striking panorama made of crystal and steel, a contemporary insertion by Bruno. On the other side is the Manica Lunga, designed by the Castellamonte brothers, which Juvarra intended to destroy in order to house a new wing of the same dimensions as the existing one. It has been at the center of the restoration campaign since 1986, as can be seen from a date inscribed on the wall. Today, Bruno’s large windows fill the hole left by the interrupted demolition.