삼국유사 is a historical text written by the Korean monk 일연 in the 13th century. It serves as a collection of legends, myths, and historical accounts related to the three kingdoms of Korea: 고구려, 백제, and 신라. The work is significant for preserving Korea's cultural heritage and folklore. The text is divided into several sections, including the origins of the Korean people and the founding of the three kingdoms. 삼국유사 is considered one of the most important sources for understanding early Korean history and has influenced literature and culture throughout the centuries.