The Epic of Gilgamesh, surviving in various Akkadian recensions compiled across roughly a millennium and most completely preserved in a version found at Nineveh's royal library, recounts the legendary king Gilgamesh's quest for immortality and includes a flood narrative widely compared by biblical scholars to the later Genesis flood account, suggesting a shared ancient Near Eastern mythological reservoir from which both Mesopotamian and biblical tradition independently or interdependently drew.
The Enuma Elish, Babylon's principal creation myth, recounts the god Marduk's defeat of the primordial chaos goddess Tiamat and the subsequent creation of the world and humanity from her remains, a text recited annually during Babylon's New Year Akitu festival as a central element of Babylonian state religious ceremony. Akkadian cuneiform also preserves an enormous body of Mesopotamian divinatory literature, including extensive omen texts systematizing the interpretation of celestial events, animal entrails and other phenomena believed to reveal divine will, reflecting the deep integration of Mesopotamian religious practice with astronomy, astrology and formalized divination throughout the region's long history.