| Native name | Muang Then |
|---|---|
| Life span | c. 8th century – 1067? |
| Event start | Establishment |
| Year start | c. 8th century |
| Event end | Known as Ngưu Hống |
| Year end | 1067 |
| P 1 | Nanzhao |
| S 1 | Ngưu Hống |
| Common languages | Black Tai |
| Religion | Theravada Buddhism, Mahayana Buddhism, animism |
| Leader 1 | Khun Borom |
| Year leader 1 | c. 8th century |
Muang Thaeng or Mường Thèn is a legendary Tai locality believed to be associated with modern-day Mường Thanh Valley in Điện Biên province of Vietnam. [1][2]
In legend, it is the initial settlement of Tai people migrating southward from Yunnan around the time of the Kingdom of Nanzhao under their leader Khun Borom, who is associated[1] with Piluoge (ruler of Nanzhao from 728 to 748).