126 A HISTORY OF ART IN CIIALIXEA AND ASSYRIA. 2. The General Principles of Form. If in our fancy we strip the buildings of Chaldsea and Assyria of all their accessories, if we take from them their surface ornament and the salience of their roofs, the bare edifice that remains is what geometricians call a rectangular parallelepiped. Of all the types created by this architecture, the only one of which we still possess a few fairly well preserved examples is that of the palace. It is therefore the best known of them all, and the first to excite attention and study. Now, upon the artificial mound, the wide terrace, over which its imposing mass is spread, the palace may be likened to a huge box whose faces .are all either horizontal or vertical (Plate V.). Even in the many-storied temples, whose general aspect is modified of course to a great extent by their height, the same element may be traced. We have endeavoured to restore some of these by collating the descriptions of the ancient writers with the remains that still exist in many parts of Mesopotamia (Plates II., 1 1 1., and IV.). Their general form may be described as the box to which we have compared the palace repeated several times in vertical succession, each box being rather smaller than the one below it. By these means their builders proposed to give them an elevation approaching the marvellous. The system was in some respects similar to that of the pyramid, but the re-entering angles at each story gave them a very different appearance, at least to one regarding them from a short distance. Only now and then do we find any inclination like that of the sides of a pyramid, and in those cases it applies to bases alone (Plate IV.). As a rule the walls or external surfaces are perpendicular to their foundations. We may, perhaps, explain the complete absence from Chaldsea of a system of construction that was so universal in Egypt by the differences of climate and of the materials used. Doubtless it rains less in Mesopotamia than even in Italy or Greece. But rain is not, as in Upper Egypt, an almost unknown phenomenon. The changes of the seasons are ushered in by storms of rain that amount to little less than deluges. 1 Upon sloping walls of dressed 1 OPPERT (Expedition Scientifiqite, vol. i. p. 86) gives a description of one of these storms that he encountered in the neighbourhood of Bagdad on the 26th of May.
