Berosus tells us that Nabonetus (Nabunahid) built the walls of Babylon on the river of burnt bricks and bitumen. A number of these bricks, found in the remains of the bulwarks, confirm the statement: Nabonetus as a fact completed the walls of the river. Red or gray, and entirely covered with bitumen, they display the stamp: "Nabunahid, king of Babylon, maintainer of Bit Saggatu, and Bit Zida, worshipper of Nebo, son of Nabubalatirib."[735] Nabonetus did not only build at Babylon; bricks at Senkereh and Ur prove that there also he continued the buildings of Nebuchadnezzar.[736] On an injured cylinder, discovered at Ur (Mugheir) he tells us that Nebuchadnezzar had begun to erect there the temple of Samas and Sin, his lords; that he, Nabonetus, completed the work.[737] We are acquainted with the heaps of this temple in the north-west of the ruins (I. 289). The tiles of the lower story bear the stamp of Urukh, those of the upper the stamp of his son Dungi; others show the stamp of Ismidagon, king of Ur, and Kurigalzu of Babylon, who restored this temple at the end of the fifteenth century.[738] On four clay cylinders found in these ruins, which repeat the same inscription, Nabonetus tells us that the building of the ancient kings, Urukh and Dungi, in honour of the great goddess (of Ur), lay in ruins. This temple he restored on the old foundations, as it had been before, in bricks and bitumen. He had completed this structure in honour of the god Sin; might the god grant continuance to his work. At the same time he entreats Sin to implant reverence for his great divinity in the heart of his first-born son, Bel-sar-ussur (Belshazzar).[739] Beyond this we only know of Nabonetus that in the year 551 B.C. he made Hiram, of the race of Ethbaal, whom Nebuchadnezzar had carried to Babylonia after the blockade of Tyre, king of that city, and sent him there.[740] The most difficult of all tasks was already awaiting Nabonetus: he had to meet the storm which convulsed Asia. Nebuchadnezzar had been ever intent on making the power of his kingdom equal to the power of the Medes. Media and Lydia too were now subject to Cyrus. A mightier power than Nebuchadnezzar had ever looked forward to had set foot in Babylonia, in the East, the North, and the West.