The Sumerian religion.
Political and religious power in ancient Sumer were associated in many ways. According to Sumerian beliefs, each deity(god or goddess) made his or her home in a different city becoming the main god or goddess there. Each city was thus the home of a religious cult dedicated to a " local god or goddess". The Sumerians had a large pantheon (all the gods and goddesses of a certain culture) lead by Anu, who was the supreme god who chose Uruk as his home. There were other deities as well, like Enlil,who was a god of plenty and a god of harsh justice. There was also the god Enki. He was the god of wisdom (knowledge) and the sea. Ur was home to the god Nanna. Nanna was the moon god. The sun god was Utu. Utu was worshiped in Larsa and Sippar. The most important goddess would be Inanna. Inanna's associations included fertility and war. Myths about these and other Sumerian gods have become a very big part of Sumerian literature.