Final answer:
Hammurabi's greatest accomplishment was the creation of his legal code, the Code of Hammurabi, which established a system of justice and provided a basis for future legal systems.
Step-by-step explanation:
Hammurabi's greatest accomplishment was the creation of his legal code, known as the Code of Hammurabi. This code consisted of a set of laws that governed various aspects of Babylonian society, such as inheritance, property rights, and criminal behavior. It was inscribed on stone pillars and served as a guide for the people of Hammurabi's empire. The Code of Hammurabi was a significant achievement because it established a system of justice and provided a basis for future legal systems.