Urasoe Castle浦添城

Urasoe Castle浦添城 - Credit: Wikimedia Commons

is a Ryukyuan gusuku which served as the capital of the medieval Okinawan principality of Chūzan prior to the unification of the island into the Ryukyu Kingdom, and the moving of the capital to Shuri. In the 14th century, Urasoe was the largest castle on the island, but today only ruins remain. Read more on Wikipedia

type: military installation
date from: late 13th – early 14th century; later expanded and refurbished

Source: en.wikipedia.org