Ur-Nammu ordered the construction of the Great Ziggurat of Ur. He founded the Third Dynasty of Ur around 2112 BCE and launched major building projects to restore and monumentalize Sumerian religious centers.
The ziggurat was dedicated primarily to Nanna, the Sumerian moon god and patron deity of Ur. It was built from mud bricks, with baked bricks and bitumen used in parts of its exterior. The surviving lower levels show the massive scale of the platform, although the original upper shrine no longer survives.
Ur-Nammu’s son Shulgi continued and completed many projects begun during his reign, so the monument is sometimes associated with both kings. Much later, the Babylonian king Nabonidus repaired the ziggurat. That later restoration does not change its foundation under Ur-Nammu.