On the inside the decorations were added and the rooms on the second floor (the bridal suite) were embellished during two different periods.
The first dates to about the second decade of the 18th century and refers to the rooms in the east wing that were decorated with lacquered fixtures and boiseries and were frescoed between 1720 and 1738 by Sebastiano Galeotti with scenes depicting: Allegory of the element Water; Allegory of the element Earth; the marriage of Juno and Jove; the fall of Icarus with pairs of Satyrs (Icarus Room).

The refined plasterers who collaborated with Galeotti remain unknown although the style is that of Antonio Ferraboschi and Carlo Bossi.

Giovanni Bolla was commissioned in 1719-20 to paint copies from Farnese and Sanvitale portraits and Sanvitale portraits from life.

A later series of decorations was added around 1787 and was carried out mainly in the rooms along the façade. A number of important artists worked on the building at this time, including fresco painters and plasterers like Domenico Muzzi, the Albertolli brothers, Cousinet and Bossi, decorating the ballroom, the dining room and the music room, in particular.
In the lunettes along the walls of one of the great halls flanking the corridor on the ground floor, there are traces of frescoes in the Baglioni style with Parted curtains revealing landscapes and Festoons of fruit and cherubs, that can be dated to the last decades of the 16^th century or early 17^th. Of particular interest at the center of the ceiling in the rooms on the ground floor areApollo and the Musical Muses (1564 ca.) by Jacopo Bertoja and Allegorical Frescoes of the Sanvitale Home (1719-20 ca.) by Giovanni Bolla and Domenico Aldrovandini.