Harlech Castle is a medieval castle in Harlech, Gwynedd. It was built by Edward I between 1282 and 1289. It is one of four concentric castles, namely Caernarfon, Beaumares and Conwy, that were built after the campaign of 1282. The strength of the concentric castles was the two walls, that is, the outer wall and the inner wall. These fortress castles were designed based on the architecture of the forts built by the Crusaders in the Middle East.
The castle played an important role in Welsh history in the following centuries.
