On the sites that must be chosen to make things that have relief with grace. In streets turned toward the west, the sun being at midday, and let the walls be so high that the one turned to the sun does not reverberate onto the shadowed bodies; and the air would be good without splendour of sun. Then here will be seen the sides of the faces partaking of the darkness of the walls opposite to them; and thus the sides of the nose, and all the face of the visage turned toward the mouth of the street, will be illuminated. For which reason the eye that is in the middle of the mouth of such a street will see that face, with all the faces turned toward it, illuminated, and those sides that are turned to the walls shadowed. And to this will be added the grace of shadows, with a gracious losing [gradation], entirely deprived of every sharp boundary. And this will arise by cause of the length of the light that passes between the roofs of the houses and penetrates between the walls, and terminates upon the pavement of the street, and rebounds by reflected motion into the shadowed places of the faces, and brightens them somewhat. And the length of the aforesaid light of the sky, stamped by the edges of the roofs, with its front standing over the mouth of the street, illuminates almost as far as near the birth of the shadows that stand under the projections of the face; and so, from step to step, it goes changing into brightness, until it terminates upon the chin, with a darkness insensible in every direction. As if such light were at a e, see the line f e of the light that illuminates as far as under the nose, and the line c f that only illuminates as far as under the lip. And the line a h extends as far as under the chin, and here the nose remains strongly luminous, because it is seen by all the light a b c d e.

a b c d e, f, h