The ancient relic used by historians to learn about Babylonian law is the Code of Hammurabi. This monumental inscription, dating back to around 1754 BC, contains one of the earliest written legal codes, detailing laws and punishments covering aspects of daily life, including trade, family obligations, and property rights. It was inscribed on a basalt stele and prominently displayed in Babylon. The Code reflects the values and social norms of ancient Mesopotamian society, making it a crucial artifact for understanding the development of legal systems and governance in human history.