Citadel of the Hồ Dynasty

Citadel of the Hồ Dynasty (Thành nhà Hồ, chữ Nho: 城茹胡; also called Tây Đô/西都castle or Tây Giai castle) is a 15th century stone fortress in Thanh Hóa, Vietnam. It served as the western capital of the Hồ dynasty (1398–1407) while also being an important political, economic, and cultural centre in the 16th to the 18th century. It is located in modern Tây Giai commune, Vĩnh Lộc District, in Thanh Hóa Province, in Vietnam's North Central Coast region.

Tây Đô castle is rectangular in shape. Its north-south side is 870.5 m in length and its east-west side is 883.5 m in length. There are four gates: one at the south (fore gate), one at the north (back gate), one at the east (left gate), and one at the west (right gate). The southern gate is 9.5 m high and 15.17 m wide. The castle was constructed from stone blocks, each of which is 2 * in size on average. Except for its gates, the castle is mostly ruined.

The citadel was built in 1397. It was composed of an Inner Citadel made of limestone, the La Thanh Outer Wall and a 155 hectare altar. The design and decoration of architectural elements in terms of space management was meant to showcase a centralized imperial city ruled by royal power, based on Confucianism mixed with a Buddhist culture. The construction of the castle was built according to fengshui principles. The citadel was inscribed on UNESCO World Heritage Sites on June 27, 2011.