When was mesopotamian ziggurat built?

Mesopotamian ziggurats were constructed primarily during the late 3rd millennium BCE and continued into the 1st millennium BCE. The most famous ziggurat, the Great Ziggurat of Ur, was built around 2100 BCE during the reign of King Ur-Nammu. These structures served as religious temples and were significant in the architectural development of ancient Mesopotamia. Each ziggurat was dedicated to a specific deity and reflected the city-state’s wealth and power.