Final answer:
Nebuchadnezzar II was the king of the Chaldeans who rebuilt Babylon.
Step-by-step explanation:
The king of the Chaldeans who rebuilt Babylon was Nebuchadnezzar II. He ruled the Neo-Babylonian Empire from 605 BC to 562 BC. Nebuchadnezzar II is known for his architectural achievements, including the reconstruction of Babylon, particularly the famous Hanging Gardens of Babylon.
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