The complex is one of the most important historical buildings of architectural value in the Lombardy capital. It is composed of three connected volumes, dating back to different historical periods.
The main one is the former Credito Italiano building (1901, designed by the architects Luigi Broggi and Cesare Nava) bordering on Via Tommaso Grossi with the Magazzini Contratti building (1903, Luigi Broggi). The more recent wing (1960, Giovanni Muzio) completes the structure of 55,000 square meters between Piazza Cordusio, Via Grossi, Via Santa Margherita, Via San Protaso and Via Porrone.