Of all parts of the palace the doorways were most exposed to injury from the shocks of traffic, and we find their more solid plinths surmounted by higher and thicker slabs than are to be found elsewhere. These slabs are carved with the images of protecting divinities. Huge winged and man-headed bulls (Plate X)[333] or lions ([Fig. 114]), the speaking symbols of force and thought, met the approaching visitor. Sometimes a lion, reproducing with singular energy the features of the real beast, was substituted for the human-headed variety (Plate VIII).[334]

These guardians of the gate always had the front part of their bodies salient in some degree from the general line of the wall. The head and breast, at least, were outside the arch. Right and left of the passage were very thick slabs, also carved into the form of winged bulls in profile, and accompanied by protecting genii. These latter divinities are sometimes grave and noble in mien, obviously benevolent ([Figs. 8] and [29]), sometimes hideous in face, and violent in gesture. In the latter case they are meant to frighten the profane or the hostile away from the dwelling they guard ([Figs. 6] and [7]). All these figures are in much higher relief than the sculptures in the inner chambers.

Fig. 114.—Human-headed lion. Nimroud; from Layard.

All this shows that the sculptor thoroughly understood how to make the best of his opportunities when he was once called in to ornament those massive door-frames and slabs which at first were no more than additional supports for the building to which they were applied. He varied the shapes of these blocks according to their destined sites, and increased their size so as to give gigantic proportions to his man-headed bulls and lions. Some of the winged bulls are from sixteen to seventeen feet high.[335] In spite of the labour expended upon the carving and putting in place of these huge figures, they are extremely numerous, hardly less so, indeed, than the Osiride piers of Egypt.[336] In the palace of Sargon at Khorsabad, twenty-six pairs have been counted; in that of Sennacherib at Kouyundjik, there were ten upon a single façade.[337]

In those passages, halls, and courtyards, whose destination justified such a luxury, the sculptor utilized the stone lining of the walls with equal skill, but in a slightly different spirit. The figures on the façade had to be seen from a great distance, and were exposed to the full light of the Mesopotamian sun, so that their colossal proportions and the varied boldness of their relief had an obvious justification. The sculptures in the interior were smaller in scale and were strictly bas-reliefs. With the shortening of the distance from which they could be examined, their scale was made to conform more closely to the real stature of human beings. In some very spacious halls a few of the figures are larger than life, while in the narrowest galleries they become very small, the alabaster slabs being divided into two stories or more (see [Fig. 115]).[338]

There is another singularity to be noticed apropos of these sculptures. The themes treated outside are very different from those inside the palaces. The figures in the former position are religious and supernatural, those in the interior historical and anecdotic. There is much variety in the details of these narrative sculptures, but their main theme is always the glorification, and, in a sense, the biography of the sovereign.