The main entrance of the palace leads into an axial gallery which runs through the entire structure. This telescopic perspective frames the via d'acqua, or "water way", encompassing a series of monumental fountains and pools which lead to the waterfall located at the foot of Mount Briano. At the centre of the palace, the lower vestibule opens up, from which it is possible to observe all four internal courtyards at the same time. On the right stands the grand "Staircase of Honour", guarded by two marble lions symbolising the force of reason and of arms. The staircase divides into two and continues upwards in two parallel flights on each side. On the wall at the back, there are two niches holding sculptures in a precise iconographic arrangement: In the centre is the Majesty with the personifications of Merit and Truth on each side.