Atsukashiyama Barrier

Atsukashiyama Barrier - Credit: Wikimedia Commons

The was a defensive fortification consisting of embankments and moats, erected in the late Heian period by the Northern Fujiwara in what is now the town of Kunimi, Fukushima in the Tōhoku region of Japan. It was the location of a major battle during the conquest of Hiraizumi by the forces of the Kamakura shogunate in 1189. The site was designated a National Historic Site of Japan in 1981. Read more on Wikipedia

type: military structure
date from: 1188

Source: en.wikipedia.org