There, as at Babylon, we have a temple and a separate temple-tower, but they both stood within the same peribolos or sacred enclosure, along the inner side of which were built series of numerous small chambers resembling those of E-temen-anki. A street[167] ran along the north-west front of the peribolos, and two gateways[168] opened on to it from the sacred enclosure. The main entrance both to peribolos and temple was probably on the north-east side.[169] It will be noted that the plan of the temple[170] follows the lines of those already described, consisting of a complex of buildings ranged around one great court and a number of smaller ones. The shrine of the god Nabû stood on the south-west side of the Great Court, the heavily-towered façade indicating the entrance to its outer vestibule. While so much of the temple itself and of its enclosure has been cleared, the temple-tower[171] awaits excavation. It still rises to a height of no less than forty-seven metres above the surrounding plain, but such a mass of _débris_ has fallen about its base that to clear it completely would entail a vast amount of labour. The mound of soil not only covers the open court surrounding the temple-tower, but extends over the inner line of chambers on the north-west side of the peribolos. The destruction of the temple and its surroundings by fire has vitrified the upper structure of the ziggurat, and to this fact the ruins owe their preservation. For the bricks are welded into a solid mass, and, since it is no longer possible to separate them, they offer no attractions as building-material and so have escaped the fate of E-temen-anki. [Illustration: FIG. 29. GROUND-PLAN OF E-ZIDA AND THE TEMPLE-TOWER OF NABÛ AT BORSIPPA. A: The temple E-zida. B: The Temple-tower of Nabû. C, D: Gateways opening from the Peribolos on to the street which ran along that side of the sacred enclosure. E: Remains of later building. F: Chambers on south-west side of Peribolos. G, G: Street running along the north-west face of the Peribolos. (After Koldewey.)]