The via Roma reconstruction project represents one of the most important moments for modern Turin architecture. The renovation of the first stretch of via Roma is carried out on a project by the Municipal Technical Office between 1931 and 1933, rebuilding 6 blocks between Piazza Castello and Piazza San Carlo with a 46% increase in the built surface compared to the existing one. The road is widened from the previous 11m to 14.80 plus the arcades. A seventeenth-century façade scheme is imposed to conform to the two squares that delimited the new stretch of street. To make better use of the mezzanines, the arcades are covered by flat floors.