In 1722, as the old Queen Mother's apartment on the ground floor of the Petite Galerie was being prepared to be the residence of Mariana Victoria of Spain as promised wife of Louis XV, a staircase was built to lead directly into the Salon Carré on the upper level, dubbed  after Mariana Victoria.
In 1722, as the old Queen Mother's apartment in the Petite Galerie was being readied for Mariana Victoria of Spain's future marriage to Louis XV, a new staircase was built to connect directly with the Salon Carré on the upper floor, which was named after Mariana Victoria.