Ngo Si Lien was a historian of the Vietnamese Le Dynasty. He is best-known for being the principal compiler of the Dai Viet su ky toan thu; a comprehensive chronicle of the history of Vietnam and the oldest official historical record of a Vietnamese dynasty that remains today. In his 'Complete Historical Record of Dai Viet'; Ngo Si Lien is appreciated not only for the precision of his records but also for the innovative method of compilation; he was the first Vietnamese writer who extracted information for historical book from collections of myths and legends. Down to the present day; Ngo Si Lien is considered one of the most important figures in the the historiography of Vietnam.