Cang Prefecture

Cangzhou or Cang Prefecture () was a "zhou" (prefecture) in imperial China, centering on modern Cang County, Hebei, China. It existed (intermittently) from 517 until 1913.
The modern prefectural-level city Cangzhou, created in 1961, retains its name.
Geography.
The administrative region of Cang Prefecture in the Tang dynasty is in modern eastern Hebei, the area sandwiched between Tianjin and northern Shandong. It probably includes parts of modern: 