One of the most important historical and literature monuments is the “MongoliinNuutsTovchoo” (The Secret History of the Mongols) written in 1240 on the banks of river Onon. The Secret Histoiy of the Mongols is an honest, sincere account depicitingChingisKhaan without embellish¬ment or laudation, folkore and old poetry. For example the following was written about the ancestor of the Mon¬golian people BorteChono is the ancestor of Great ChingisKhaananof the Mongolian people. BorteChono’s wife was GooMaral. They lived beside the Onon river by the BurkanKhaldunmountain. After twenty two generations fromBortoChono, ChingisKhaan was born.