Sin (Akkadian: ) or Nanna (Sumerian: ) was the god of the moon in the Mesopotamian mythology of Akkad, Assyria and Babylonia. Nanna is a Sumerian deity, the son of Enlil and Ninlil, and became identified with Semitic Sin. The two chief seats of Nanna's/Sin's worship were Ur in the south of Mesopotamia and Harran in the north.