Question: how old are the ziggurats?
Answer: Sumerian ziggurat The ziggurat was built by King Ur-Nammu, who dedicated it in honour of Nanna/Sîn in approximately the 21st century BCE (short chronology) during the Third Dynasty of Ur. The massive step pyramid measured 64 m (210 ft) in length, 45 m (148 ft) in width and over 30 m (98 ft) in height.