What is a group that ruled Babylon for the longest period of time?

The Chaldeans, also known as the Neo-Babylonian Empire, ruled Babylon for the longest period, from approximately 626 to 539 BCE. This era is marked by significant cultural and architectural achievements, including the construction of the Hanging Gardens and the revitalization of Babylon as a major center of trade and governance. The most famous ruler of this dynasty was Nebuchadnezzar II, who expanded the empire and made Babylon a symbol of power and wealth. The Chaldean rule ended with the conquest of Babylon by the Persian Empire under Cyrus the Great.