Completed during the reign of King Seongjong, the Gyeongguk Daejeon is the supreme, enduring legal code that systematized all norms of state operation in Joseon, including politics, economy, society, and culture. Going beyond mere penal regulations, it meticulously defined the principles of state organization and the rights and duties of the people, acting as the sturdy backbone that allowed the Joseon Dynasty to last for 500 years.