<Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Sumerian religion was the religion practiced and adhered to by the people of Sumer, the first literate civilization of ancient Mesopotamia . The Sumerians regarded their divinities as responsible for all matters pertaining to the natural and social orders . </P> <P> Before the beginning of kingship in Sumer, the city - states were effectively ruled by theocratic priests and religious officials . Later, this role was supplanted by kings, but priests continued to exert great influence on Sumerian society . In early times, Sumerian temples were simple, one - room structures, sometimes built on elevated platforms . Towards the end of Sumerian civilization, these temples developed into ziggurats--tall, pyramidal structures with sanctuaries at the tops . </P> <P> The Sumerians believed that the universe had come into being through a series of cosmic births . First, Nammu, the primeval waters, gave birth to An (the sky) and Ki (the earth), who mated together and produced a son named Enlil . Enlil separated heaven from earth and claimed the earth as his domain . Humans were believed to have been created by Enki, the son of An and Nammu . </P>

What were the names of the religious structures built by the sumerians