The stairwell is covered by an octagonal ribbed vaulting arches made of brick glazed caramel color . The intersections of the arches are complemented with embossed floral ceramic . The white space between the arches clad in yellow mosaic on white background with floral , designed and made by Maragliano , in fact , has around a quarter folded on one of the walls , leaving a view of the lower six sides five equal size and a sixth is equivalent to the other three and that gives you a special asymmetry . All around is supported by short columns that are born and are supported on a large stone corbels which together seem to arms coming out of the wall that search the roof , finishing in capitals composed of the same ceramic flower arches .