This upper storey is more than a century later in date than the lower parts of the building; it replaces a wooden gallery for the common people, which had been made upon the top of the great corridors, which was too tempting a place for the purpose to be lost, although this wooden gallery does not appear to have formed part of the original design,—to judge from the representations of the building on the coins, which are probably made from the designs of the architects before the work was executed. There are six designs extant on the coins, and no two of them are exactly alike, especially for this upper storey[244]. THE COLOSSEUM. PLATE II. SUPERSTRUCTURE. VIEWS OF PARTS OF THE BUILDING. [Illustration: COLOSSEUM—VIEWS OF PARTS A. FROM UPPER GALLERY—LOOKING DOWN B. REMAINS OF RESERVOIR IN FIRST GALLERY] DESCRIPTION OF PLATE II. SUPERSTRUCTURE. VIEWS OF PARTS OF THE BUILDING. A. The upper view is taken from the top gallery looking down, and shewing the ruins of the lower brick galleries, with the windows of the corridors. Behind the wall in which these windows are placed is seen part of one of the corridors without its roof or vault, but with the steps of one of the _vomitoria_, and at the back of that the arches can be seen of the outer corridor; for it must be remembered that there was a _double_ corridor all round this enormous fabric. The object of this was to facilitate ingress and egress from the rest of the building, and the galleries were divided into many distinct parts, each with its own passages and steps, so that there would be no more confusion or pressure in emptying this enormous building than from the emptying of an ordinary room that would hold fifty people. In the upper part of this view, on the right hand, is seen in the distance the church of S. Stefano Rotondo and the trees on the Cœlian Hill. B. The lower view is taken from the inner side of the chief gallery on the first floor, looking outwards, through one of the arches of the corridor. In this particular compartment was one of the reservoirs of water supplied by the aqueducts. The evidence for this is seen on the right-hand side of the picture, where the lower part of a _specus_ or channel for the water remains, with some of the peculiar cement used only for the aqueducts, against the wall and lining the _specus_.