pedestals, and both pedestals and pilasters of this order are panelled, while the small order rests directly on the pavement and its pilasters are fluted. It is noticeable that the design of the central arch is almost exactly like that of the central portal of Santa Maria Novella in Florence, the smaller entablature being broken into shallow ressauts over the pilasters, giving the same character to the imposts. The front as a whole has the quiet and refined character that distinguishes this architect's work in general.
![Arch of Septimius Severus, figure 20 from "Character of Renaissance Architecture"](http://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Arch_of_Septimius_Severus_%28Character_of_Renaissance_Architecture%29.png/400px-Arch_of_Septimius_Severus_%28Character_of_Renaissance_Architecture%29.png)
Fig. 20.—Arch of Septimius Severus,
That Alberti derived all of these façades, and especially that of St. Andrea, from the Roman triumphal arch scheme a direct comparison will show; and the arch of Septimius Severus (Fig. 20) may, I think, be taken as the model that he had chiefly in mind. In Santa Maria Novella the mediæval scheme upon