Samguk Yusa, or Memorabilia of the Three Kingdoms, is a collection of legends, folktales, and historical accounts relating to the Three Kingdoms of Korea (Goguryeo, Baekje and Shilla), as well as to other periods and states before, during, and after the Three Kingdoms period.

The text was written in Classical Chinese (as used in writing by literate Koreans at that time). It was compiled, at least in part, by the Buddhist monk Iryeon (1206 - 1289) at the end of the 13th century, a century after the Samguk Sagi.

Unlike the more factually-oriented Samguk Sagi, the Samguk Yusa focuses on various folktales, legends, and biographies from early Korean history. Many of the founding legends of the various kingdoms in Korean history are recorded in the book. Illyeon covered legends from many Korean kingdoms, including Gojoseon, Wiman Joseon, Buyeo, Goguryeo, Baekje, Shilla, and Gaya.

This is the earliest extant record of the Dangun legend, which records the founding of Gojoseon as the first Korean nation.

A copy of the original text can be found at http://www.cbeta.org/result/T49/T49n2039.htm and a Korean translation can be found at http://www.bluecabin.com.ne.kr/samgukyusa/samgukyusa.htm/