The Ziggurat of Ur is an ancient step pyramid located in modern-day Iraq, built around 2100 BCE during the reign of King Ur-Nammu. It served as a temple dedicated to the moon god Nanna, reflecting the religious practices of the Sumerian civilization. The structure is made of mud bricks and originally stood about 30 meters tall. This ziggurat is part of a larger complex that included a temple and other buildings. It exemplifies the architectural advancements of the time and is one of the best-preserved ziggurats, showcasing the significance of Mesopotamian culture in early human history.