The last king of Assyria inherited an authority that extended farther and over larger numbers than had ever before been known. The vigorous governing race were perhaps corrupted and weakened by a thousand years of power and success; but various extraordinary circumstances united to bring on a sudden catastrophe. A considerable part of the central kingdom was devastated by an irresistible host of Scythians, immediately after which the Medians, who were as fierce and warlike as the Assyrians in their best days, attacked Assyria. A large army, sent by the king to meet the invaders, went over to the enemy by the treachery of its general, Nabopolassar, and the combined armies laid siege to Nineveh, which fell, the king burning himself and his family in his palace. Nineveh was destroyed, and Nabopolassar received as his reward the kingdom of Babylonia, and the Assyrian conquests in the south and west. He founded the 11. Babylonian Empire, which has made a greater impression on posterity than Nineveh. He was a man of great energy and resources. The treasures and captives of that mighty city, that fell to his share, were employed in rebuilding and improving Babylon. During his reign of twenty-one years, and the forty-three years of his still more illustrious son and successor, Nebuchadnezzar, that city was made the wonder of the world. Each side of it was fifteen miles in length, the river Euphrates passing through its center. They repaired the wall, which was eighty-seven feet thick and more than three hundred feet high. This wall was so immense as to contain more than twice the cubic contents of the great wall of China, which is 1,400 miles in length, and the vast enclosed space was filled with palaces, temples, hanging gardens, and all the impressive evidences of boundless power and resources in which the gross ambition of that period delighted. A second wall was built within the first, the river was, for a time, turned out of its bed and its bottom and sides paved with masonry, and huge walls erected on either bank; canals and aqueducts, for agricultural purposes, of the most stupendous character, were constructed all over the broad valley. The wealth and energies of the richest and most populous part of Asia, as then known, were employed to build up the great capital and improve the central province. 12. The Jews were kept there, as captives, for seventy years, all the treasures of their city and temple, and the accumulated wealth of their nation, were poured into the Babylonian treasury, and their people employed, with other countless multitudes, in the construction of its walls and buildings, and the cultivation of its fields. Tyre, the most renowned commercial city of ancient times, was taken, after a siege of thirteen years, and much of Egypt was reduced. It was the culmination of the centralizing system of the Assyrians and Chaldeans which had lasted for two thousand years.