The Ziggurat of Ur is an ancient stepped pyramid located in the southern Iraqi city of Nasiriyah, near the ancient city of Ur. It was built during the Early Bronze Age around 2100 BCE by the Sumerian king Ur-Nammu, and was dedicated to the god Nanna. The ziggurat was the centerpiece of a large temple complex that included a courtyard, a temple, and other buildings.

The Ziggurat of Ur was made of mud bricks and rose to a height of about 64 feet (20 meters). It had three levels, each smaller than the one below it, and was topped by a temple that was accessible by a stairway. The outer surface of the ziggurat was covered with a layer of bitumen to protect it from the elements.

The temple complex at Ur was one of the most important religious centers in ancient Mesopotamia, and the Ziggurat of Ur was the largest and most impressive of the many ziggurats that were built in the region. The ziggurat served as a symbol of the power of the Sumerian kings, and was also believed to provide a bridge between heaven and earth, allowing communication between the gods and humans.

The Ziggurat of Ur was excavated by British archaeologist Leonard Woolley in the 1920s and 1930s. Woolley's team found evidence of several phases of construction and modification of the ziggurat, including a renovation by the Babylonian king Nabonidus in the 6th century BCE. The remains of the ziggurat are now part of the ruins of the ancient city of Ur, which is a UNESCO World Heritage Site.