The Castle floors are accessed by a metallic staircase suspended by steel tie-beams designed by the architect Andrea Bruno. Galleries 1, 2, 3, 4, 5, 16 and 17 are painted white and were never decorated due to interruptions in construction during the tenure of both architects, Filippo Juvarra and Carlo Randoni. From these we proceed to gallery 7, known as the State Room or Room of the Grotesques. The decoration of this room was begun with Juvarra and completed at the end of the century when the court chambers were prepared. The vault preserves a fresco which has been attributed to the workshop of Filippo Minei and Nicolò Malatto.
Gallery 8, the Room of the Cages, along with the three adjacent rooms, made up the chambers of Vittorio Amedeo II.