The Court of Nanna, located due east of the ziggurat, was dedicated to the Moon god of the same name, and was most likely a gathering place for worshipers. It consisted of a large, paved courtyard that originally measured 65.7 meters by 43.6 meters that was entered via a triple gate that passed under a high gate tower. The courtyard was surrounded by a number of small rooms that were used as offices and workshops, as well as for storage. The entire structure was built of mudbrick with a baked brick facing and was surrounded by a retaining wall. Originally constructed during the Third Dynasty of Ur, the building underwent numerous changes under different rulers between the twentieth century BCE and the sixth century BCE.