The Secret History of the Mongols is the oldest surviving literary work in a Mongolian language. Written for the Mongol royal family some time after the death of Genghis Khan in 1227, it recounts his life and conquests, and partially, the reign of... Wikipedia
Publication date: Year of the Rat in the 13th century (c. 1228/1229, 1240, 1252, 1264)