Additional units were added, as the entrance building, the office section and the Cappella Maggiore, precisely aligned with the pre-existing cloister and connected with it through an open portico path.

Typical features of Muzio’s architecture are the bell tower, which underlines the main building, and the use of marble for the entrance, thus differentiating the “noble” surface from the other brick ones; an important role is also played by terra-cotta, which comes straight from the Lombardy building tradition.

Four new staircases were added to the pre-existing cloisters and some 18th-century walls were knocked down to join the various rooms and form the classrooms. Finally, the library was added between the two cloisters and the Benedictine refectory was adjusted to become the Great Hall: floors and partition walls were knocked down and the old vault with lunettes and the windows, that had been walled up in the Napoleonic period, were enhanced.

In 1933-34, two men’s boarding schools, of which one reserved for seminarists, were added to the central building: they are two separate, five-floor buildings connected by a horizontally distributed unit. The women’s boarding school was added in 1937. The last addition was the canteen from 1949, characterized by a particularly sober style, in which Muzio has profusely used plastered faces, brick finishes and grilles to enhance the windows.

An element symbolzing the undertaking is the characteristic facade with the bronze statue of King Christ by sculptor Giannino Castiglioni.