 For the decoration of the interiors he was constrained to work with Jacques Gabriel, who had been introduced to the duchess's confidence by her advisor, Abraham Peyrenc de Moras.The Palais Bourbon has undergone many transformations since, but Aubert's work can be seen in six plates of Jean Mariette, "Architecture françoise".Right next to the Palais Bourbon, Jean Aubert was also put in charge of the Hôtel de Lassay, which Lassurance had also begun, for the marquis de Lassay, the lover of the duchesse de Bourbon.