The intervention by Giulio Romano consisted certainly in the design of the building. His style is visible in the overall decoration, in the blocks forming the pillars and the walls of the building. The main feature is the rustic ashlar, one of the main elements characterising the work of Romano. Here the roughness of the overall design is due to the fact that these constructions were intended for humble, though important, trades. The space was indeed meant for workshops. The ashlar portico was to become one of the most used elements in the inventions of Romano in the years preceding his death.