Caccia Dominioni House, Private residence in Piazza Sant'Ambrogio, Milan, Italy.

The Caccia Dominioni House is a residential building at Piazza Sant'Ambrogio 16, facing the basilica, with a side facade on Via San Vittore. Its main front has a ground floor plus four upper floors, two loggias on the first and fourth floors, and a surface partly plastered in Terra di Siena and partly clad in stone. The central portal leads to an entrance hall and inner courtyard; two circular staircases with central lifts connect the apartments.

Built from 1947 to 1949 by Luigi Caccia Dominioni as his family's residence, the house replaced an old palazzo severely damaged in World War II bombings. The Soprintendenza initially required keeping the neoclassical facade, but the damage led to approval of a new building designed to fit the historic square.

The house is still the seat of Luigi Caccia Dominioni's archive, keeping his drawings and papers in the building he designed for his own family. Its name comes from the architect himself, who built it as the residence of the noble family he belonged to, on the site of an old palazzo destroyed by wartime bombing.

Access is from Piazza Sant'Ambrogio, a central square in Milan's historic district. Since this is an occupied residential building, visitors can only see the exterior and admire the architectural details from the street.

The two circular staircases have their lifts placed at their centre, a compact arrangement that frees the floor plans. The building also houses Luigi Caccia Dominioni's own archive, so the residence he built for his family now keeps the records of his work.