The hall is the direct witness of the works situation of the Juvarra period at the moment of its interruption.  The architect Andrea Bruno, knowing the plan, thanks to the painting made by  Marco Ricci  and  Massimo Teodoro Michela, decided to do not complete it .  At the north side of the Castle there are the  strong pillars wanted by Juvarra, while on the porfyry pavement, the marble and stone slates draw the positions of the supports and the directions of the bays, never realized. The imposing wall of the Castle shows its supports and decorations never made, the niches for the statues and the big closed holes that remember the great spaces projected by the sicilian architect.   In the higher part there is the sporto panoramico  made in crystal and steel contemporary  insertion by Andrea Bruno. At the other side the  Manica Lunga, Castellamonte’s building born to host the gallery of the Duke  Carlo Emanuele I, that, following the Juvarra projects had to be destroyed, it has been the centre of the restoration campaing started in l 1986 as it is possible to read on the date put on the wall. The building today has great windows openeb by  Andrea Bruno where there was the big hole left by the interrupted demolition.