Lý Nhân Tông
The 55-year rule of Lý Nhân Tông is the longest reign in the history of Vietnamese monarchs. For his contributions, Lý Nhân Tông is still considered a great emperor of the Lý Dynasty, credited with solidifying the Lý Dynasty's rule in Vietnam and stabilizing the country for future Lý emperors. During his 55 years of rule, Lý Nhân Tông not only cultivated the agriculture and military strength of Đại Việt, but also established a national education for Confucian learning with the establishment of the first imperial examinations and the first imperial school for Confucian learning in Thăng Long which is still preserved today. Besides these accomplishments, Lý Nhân Tông is well known for his talent in writing poetry with three poems that still remain, "Tán Giác Hải thiền sư, Thông Huyền đạo nhân", "Truy tán Vạn Hạnh thiền sư" and "Lâm chung di chiếu". To commemorate the successful reign of Lý Nhân Tông, a stele was erected in 1121 with the content composed by the minister of justice Nguyễn Công Bật. Called Sùng Thiện Diên Linh Stele, this work still stands today and is considered one of the most important steles in the History of Vietnam.