The welsh castle Harlech cost is £8190, the arcieth is James of Saint George. Edward I Built it.It is currently 736 years old,built in 1283 now that’s really old.harlech is a Medieval fortification.The material is sandstone also the owner is Cawd.The location is 11m N Barmouth on A496 coordinates.It wascaptured by Owain Glyndwr in 1404 by his English troops and turned it into a fortress in 1407.