Mesopotamia's two important rivers were the Euphrates and the . Large stepped pyramid structures found in Sumerian temple complexes are called . The practice of worshipping more than one god is called . was the system of writing invented by the Sumerians. The earliest story in literature is the . The earliest written code of laws was created by the Babylonian king . Respond to the following based on your reading. Civilizations possess certain common characteristics. What are these characteristics? What's Hammurabi's Code and what does it tell you about Babylonian society?