《삼국사기》, or the "Chronicles of the Three Kingdoms," is a historical text written by the Korean scholar 김부식 in the 12th century. It chronicles the history of the three ancient Korean kingdoms: 고구려, 백제, and 신라. The work is considered one of the most important historical records of Korea, providing insights into the political, social, and cultural aspects of the time. The text is divided into several sections, including the histories of each kingdom and notable figures. It serves as a vital source for understanding the formation of the Korean nation and its early history, influencing later historical writings and studies in Korea.