Dao Prefecture

Daozhou or Dao Prefecture () was a "zhou" (prefecture) in imperial China centering on modern Dao County, Hunan, China. In the Yuan dynasty it was known as Daozhou Route () and in the Ming dynasty (briefly) as Daozhou Prefecture (). It existed (intermittently) from 634 to 1913.
Geography.
The administrative region of Daozhou in the Tang dynasty falls within modern Yongzhou in southern Hunan. It probably includes modern: