Terragni's most important work is the house of the beam in Como (1932-36), considered the manifesto building of Italian rationalism. The house of the beam was a building that had no previous cultural references, in this case the architect solves it in an absolutely rationalist way. Terragni starts from an idea of Mussolini's Fascism, who considered Fascism as a glass house and therefore here too he wants to create a structure that can be easily penetrated. The area on which it operates is small and was part of a project that started from the cathedral, from which you had to see two mirror buildings, but only one was built, the house of the beam. The architect uses a classical system, along the lines of thought typical of rationalism and the regime, which always wants to start from premises related to classicism, so the house of the beam is a half cube covered with marble that is placed on a short staircase (to give monumentality), totally open entrances and possibility to completely e