Harlech Castle is a medieval castle located in Harlech, in the Welsh county of Gwynedd. The castle was built during the 13^th century by the English king, Edward I, as part of an ‘iron ring’ of castles aimed at the subjugation of Gwynedd. As a defensive structure, Harlech Castle played an important role in the region’s history in the centuries following its construction. By the 17^th century, however, Harlech Castle lost its military function, and fell out of use. Nevertheless, it received a new lease of life in subsequent centuries, as it began to attract tourists. Today, Harlech Castle is a tourist destination, and is recognized as a UNESCO World Heritage Site, as part of the ‘Castles and Town Walls of King Edward in Gwynedd’.