The Birs Nimroud, "the palace of Nimrod" of the Arabs, and "the prison of Nebuchadnezzar" of the Jews; by old travellers believed to be the very ruins of the tower of Babel; by some, again, supposed to represent the temple of Belus, the wonder of the ancient world; and, by others, to mark the site of Borsippa, a city celebrated as the highplace of the Chaldean worship, is a vast heap of bricks, slag, and broken pottery. The dry nitrous earth of the parched plain, driven before the furious south wind, has thrown over the huge mass a thin covering of soil in which no herb or green thing can find nourishment or take root. Thus, unlike the grass-clothed mounds of the more fertile districts of Assyria, the Birs Nimroud is ever a bare and yellow heap. It rises to the height of 198 feet, and has on its summit a compact mass of brickwork, 37 feet high by 28 broad,[199] the whole being thus 235 in perpendicular height. Neither the original form or object of the edifice, of which it is the ruin, have hitherto been determined. It is too solid for the walls of a building, and its shape is not that of the remains of a tower. It is pierced by square holes, apparently made to admit air through the compact structure. On one side of it, beneath the crowning masonry, lie huge fragments torn from the pile itself. The calcined and vitreous surface of the bricks fused into rock-like masses, show that their fall may have been caused by lighting; and, as the ruin is rent almost from top to bottom, early Christian travellers, as well as some of more recent date, have not hesitated to recognise in them proofs of that divine vengeance, which, according to tradition, arrested by fire from heaven the impious attempt of the first descendants of Noah. Even the Jews, as it would appear, from Benjamin of Tudela, at one time identified the Birs Nimroud with the Tower of Babel. Whatever may have been the original edifice, of which the Birs Nimroud is the ruin, or whoever its founder, it is certain that as yet no remains have been discovered there more ancient than of the time of Nebuchadnezzar. Every inscribed brick taken from it--and there are thousands and tens of thousands--bear the name of this king. It must, however, be remembered, that this fact is no proof that he actually founded the building. He may have merely added to, or rebuilt an earlier edifice. Thus, although it would appear by the inscriptions from Nimroud, that the north-west palace was originally raised by a king who lived long before him whose name occurs on the walls of that monument, yet not one fragment has been found of the time of that earlier monarch. Such is the case in other Assyrian ruins. It is, therefore, not impossible that at some future time more ancient remains may be discovered at the Birs.