Ur-Nammu's empire lasted about 100 years and then other people controlled the cities of southern Mesopotamia.
Ziggurats continued to be built or rebuilt. Most cities of Mesopotamia, from Babylonia to Assyria, had their own.
All that remains of the towering ziggurat at Babylon is a muddy ditch full of reeds.
One of the most famous was in Babylon. It was dedicated to Marduk, the god of the city, and was called 'Etemenanki' meaning 'House platform of Heaven and Earth'.