Babylon
With the recovery of Babylonian independence, a new era of building followed, and Nebuchadnezzar II (604–561 BCE) made Babylon into one of the wonders of the ancient world.  Nebuchadnezzar ordered the complete reconstruction of the imperial grounds, including rebuilding the Etemenanki ziggurat and the construction of the Ishtar Gate — the most spectacular of eight gates that ringed the perimeter of Babylon. All that was ever found of the Original Ishtar gate was the foundation and scattered bricks.