Shikiyama Castle

Shikiyama Castle - Credit: Wikimedia Commons

was a Nanboku-chō period yamajiro-style Japanese castle located in what is today the Mureshikiyama neighborhood of the city of Hōfu in Yamaguchi Prefecture. Its ruins have been protected by the central government as a National Historic Site since 1935. Read more on Wikipedia

type: military installation
date from: 1336

Source: en.wikipedia.org