Samguk Sagi is a historical text that chronicles the history of the three kingdoms of Korea: Goguryeo, Baekje, and Silla. Compiled in the 12th century by the historian Kim Bu-sik, it serves as one of the earliest and most important records of Korean history, detailing events, rulers, and significant cultural developments. The text is divided into several sections, including the histories of each kingdom and their notable figures. Samguk Sagi is valued for its insights into the political and social structures of ancient Korea, as well as its influence on later historical writings and national identity.