Babylon threw off the Assyrian rule in 612 BCE and became the capital of the Neo-Babylonian Chaldean Empire.
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.
Nebuchadnezzar is also credited with the construction of the Hanging Gardens of Babylon (one of the seven wonders of the ancient world), said to have been built for his homesick wife Amyitis. Whether the gardens did exist is a matter of dispute. Historians disagree about the location, and some believe it may have been confused with gardens in Nineveh.

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