Dao Duy Tu Rampart also called Thay Rampart under Bao Ninh and Hai Ninh Commune, Dong Hoi City and Quang Ninh District, Quang Binh Province. Dao Duy Tu Rampart system began construction since 1630 to 1662 in order to prevent Trinh enemy. Dao Duy Tu rampart system associated with military genius Dao Duy Tu, he […]