Which key figure ruled over babylon at its height of power and influence?

Nebuchadnezzar II

Explanation:

The most likely answer is Nebuchadnezzar II. Nebuchadnezzar II was a king of Babylon. He was the longest-reigning and most powerful king of the Babylonian Empire. He ascended to the throne in 620 BCE, and during his reign, he conquered Judah, organized many campaigns in the West and developed the capital city of Babylon (now the largest archaeological site in the Middle East). He is also mentioned by the Bible as the destroyer of Salomon's Temple.

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