A diachronic survey of the Sumerian ideas about Beginnings __ cosmogony, theogony and anthropogeny __ is described. Third millennium Sumerian texts describe the 'marriage' of the primaeval pair an and ki __ Heaven and Earth, thereafter the sky god An and the mother goddess Nin__ursa_a __ and the birth of their children: gods. From the second millennium onwards the Sumerian culture disappeared, except from the scribal schools; there was an increasing Semitic influence. The beginning became a primaeval ocean, Namma who gave birth to an-ki. Later the pair Aps_ and Ti'amat produced heaven and earth __ not yet in their final form __ and the ancestors of An. Aps_ and Ti'amat were killed. Marduk gave heaven and earth their final appearance with bo...