The remarkably large complex is made up of four bodies arranged around a rectangular courtyard, with the main facade facing Piazza Botta, and another wing to the right. The building appears today in its "classicist" guise, the result of the interventions and remodeling between 1887 and 1893, designed by the engineer Leopoldo Mansueti and implemented by the engineer Augusto Maciachini, which already at the time aroused controversy because they destroyed many baroque rooms of the building. In fact, the current facade on the square, the two symmetrical staircases, the architectural definition of the elevations on the courtyard and the one on the garden area date back to this period, now largely occupied by pavilions and buildings built for scientific institutes and from the Labor Clinic. Furthermore, still in the same years, a new building was built at the back of the noble court, equipped with large semicircular exedras equipped with tall ventilation chimneys made in imitation of minarets. The facade has a classicist physiognomy: centrally it is marked by a double order of semi-columns (Doric on the ground floor and Ionic on the first floor) which frame seven axes of windows, and with an arched portal in the centre. The first floor, rusticated, has windows, while on the first floor there are framed windows, crowned by alternating triangular and semicircular tympanums, on a face of regular courses of bricks left exposed. The other two sides of the long facade take up, with small variations, the shapes of the central part, but are entirely plastered. Through the door you can access two symmetrical staircases, which allow you to go up to the first floor, where some rooms of the original Baroque palace have been preserved. In particular, five rooms maintain the frescoes attributed to
Giuseppe Natali on the vaults, such as the room located in the north-east corner of the building, where the
Translation of Psyche on Olympus is found, framed by pilasters and Doric columns and busts of divinities painted classics. Then there is the room with the large medallion on the vault depicting an
Allegory of Virtue, the one with an
Allegory of Fame. In correspondence with the room with the
Allegory of fame, on the south side of the same building, there is a room with the
abduction of Cephalus. In other rooms, covered by false ceilings or hidden by whitewashing, there are other frescoes. Two other rooms, probably decorated after the 1738 expansion, retain the original eighteenth-century decoration: a room that served as an antechamber to a bedroom and the alcove. The first room is certainly the one that has maintained its original characteristics, it is decorated with stuccos, it retains the eighteenth-century doors in carved wood, the fireplace in polychrome marble (still equipped with the fireguard bearing the Botta Adorno coat of arms), while on the vault there is a large fresco depicting
Diana and Endymion, attributed to
Giovanni Angelo Borroni. The fresco on the vault of the alcove niche is of a totally different type: it shows
Antoniotto Botta Adorno (sent by
Maria Theresa to
St. Petersburg to negotiate peace between the Austrian and
Russian empires and to conclude the marriage between his cousin of the empress,
Antony Ulrich of Brunswick, and the niece of the tsarina,
Anna Leopoldovna) at the feet of the tsarina
Anna of Russia enthroned together with the two spouses. ==References==