Who were the people who built temples called ziggurats?

The people who built ziggurats were the ancient Sumerians, Babylonians, and Assyrians of Mesopotamia. These structures served as massive terraced temples dedicated to their gods, reflecting the civilization's religious beliefs and societal hierarchy. Ziggurats were constructed primarily during the third millennium BCE and were central to the urban landscape, symbolizing the connection between the divine and the earthly realm.