Đồng Khánh
According to Đại Nam thực lục () and other archives from the reign of Emperor Đồng Khánh, the wall was constructed in 1819 by Lê Văn Duyệt, a high-ranking mandarin, under Emperor Gia Long early in the Nguyễn Dynasty. The wall is considered the "greatest engineering feat" of the Nguyễn Dynasty. Nguyen Tien Dong contended that the wall was constructed over 500 years ago and was adopted for military purposes during the 19th century. Nguyen Dang Vu, director of the Department of Culture, Sports and Tourism of Quảng Ngãi, said that parts of the wall in mountainous regions existed hundreds of years ago. It was possibly constructed by General Bui Ta Han (1496–1568) when he became the leader of Quảng Nam. Archaeologists have excavated ceramic relics that verify the 16th-century origin.