The Castles and Town Walls of Edward I in Caernarfon, Conwy, Harlech and Beaumaris are a World Heritage Site managed by Cadw on behalf of the Welsh Ministers.
Mae Cestyll a Muriau Tref Edward I yng Nghaernarfon, Conwy, Harlech a Biwmares yn Safle Treftadaeth y Byd a reolir gan Cadw ar ran Gweinidogion Cymru.