The mansion dates back to the time of Ludovico il Moro, during which the lord of Milan granted numerous building permits to courtiers and collaborators, wishing to make the road axis of the ancient borgo di porta Vercellina a prestigious surround for the newly built church of Santa Maria delle Grazie.

[2] The duke, after buying the residence in 1490 from the Landi, counts of Piacenza, donated it to the Atellani, his courtiers: the house became famous for the feasts organised by the owners, also described in many chronicles of the time, which brought together the leading personalities of the Sforza court.

[3] After many changes of ownership over the centuries, it came into the hands of the Conti family, who in 1922 had the house restored by the architect Piero Portaluppi, who heavily modified its appearance, but rediscovered part of the original frescoes.

[6] After the Sala dello Zodiaco one proceeds to the study of Ettore Conti, a great entrepreneur of the Italian electrical industry who entered the residence in the early 20th century.

In the room, which directly overlooks the garden of Leonardo's vineyard, there is a fireplace surrounded by inlaid wooden walls, where the coats of arms and insignia resulting from the alliance of the marriage between Christina of Denmark and Francesco Sforza can be distinguished.