A: East Court of the Palace of Nebuchadnezzar. B: Central Court. C: Great Court. D: Private portion of palace built over earlier Palace of Nabopolassar. E: West extension of palace. F: Throne Room of Nebuchadnezzar. G: Sacred Road, known as Aibur-shabû. H: Ishtar Gate. I: Continuation of Sacred Road with Lion Frieze. J: Temple of Ninmakh. K: Space between the two fortification-walls of crude brick, probably Imgur-Bêl and Nimitti-Bêl. L: Older moat-wall. M: Later moat-wall. N: Later fortification thrown out into the bed of the Euphrates. P: Southern Canal, probably part of the Libil-khegalla. R: Basin of canal. S: Persian building. T: Moat, formerly the left side of the Euphrates. V: River-side embankment of the Persian period, a: Gateway to East Court, b: Gateway to Central Court, c: Gateway to Great Court, d: Double Gateway to private part of palace, e, f: Temporary ramps used during construction of palace, g: Temporary wall of crude brick, h: Broad passage-way, leading northwards to Vaulted Building.
The two names the Babylonians gave these walls were suggested by their gratitude to and confidence in Marduk, the city-god, who for them was the "Bêl," or Lord, _par excellence._ To the greater of the two, the _dûru_ or inner wall, they gave the name _Imgur-Bêl,_ meaning "Bêl has been gracious"; while the _shaikhu,_ or outer one, they called _Nimitti-Bêl,_ that is, probably, "The foundation of Bêl," or "My foundation is Bêl."[40] The identification of at least one of the crude-brick walls near Homera with Nimitti-Bêl, has been definitely proved by several foundation-cylinders of Ashur-bani-pal, the famous Assyrian king who deposed his brother Shamash-shum-ukîn from the throne of Babylon and annexed the country as a province of Assyria.[41] On the cylinders he states that the walls Imgur-Bêl and Nimitti-Bêl had fallen into ruins, and he records his restoration of the latter, within the foundation or structure of which the cylinders were originally immured. Unfortunately they were not found in place, but among the _débris_ in the space between the walls, so that it is not now certain from which wall they came. If they had been deposited in the thicker or inner wall, then Nimitti-Bêl must have been a double line of fortification, and both walls together must have borne the name; and in that case we must seek elsewhere for Imgur-Bêl. But it is equally possible that they came from the narrow or outer wall; and on this alternative Nimitti-Bêl may be the outer one and Imgur-Bêl the broader inner-wall with the widely projecting towers. It is true that only further excavation can settle the point; but meanwhile the fortifications on the Ḳaṣr have supplied further evidence which seems to support the latter view.