Vitozzi’s strong and confident design marks a continuous, not aristocratic but elegant and tidy building curtain pattern. The Ducal Licence of 1606 proposed to the owners of the buildings "to advance towards the square with gateways pulling the facade of these houses in a straight line, in accordance with the thirst that our engineer Ascanio Vittozzi will be given". In exchange for the gift of the part of porches in front of their facade, the owners undertook to build homogeneous facades, characterized by the regular alternation of triangular and semicircular gables. With the model of porticoed facade of Vitozzi, a type of building and facing road is inaugurated that becomes systematic throughout Turin from the XVII to the XIX century.