After Le Loi (King Le Thai To) was crowned and moved the capital to Dong Kinh (or Thang Long), he had the second biggest citadel built in his native land, Lam Son. The citadel is known as Lam Kinh, or Tay Kinh Citadel.

The structures of the citadel lie along the south-north axis on the hilly area. The citadel is 341m in length and 254m in width. Its northern wall is built into an arrow shape, over 1m thick.

There are remain vestiges of the entrance and foundation of the citadel, which are found 100m from its front. The foundation is found to stretch to the bank of the Ngoc River, and it is 1.8m thick; 10m from the wall is the Ngoc River, 20m in width. Over it is a curved bridge named Tien Loan Kieu, 50m from the bridge is an ancient rectangular water well. Then comes Ngo Mon Gate, a large yard called Dragon Yard, Lam Kinh Palace, Thai Mieu (dedicated to kings and queens of Later Le Dynasty). Connecting the palace with Dragon Yard is a flight of 9 steps with 2 stone dragon couples formed according to Later Le Dynasty’s art style. In addition, Lam Kinh Relic Site has the tombs of Later Le kings, Le Lai Temple, garden with hundred-year-old trees, many auxiliary works and valuable artifacts.