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.