This is no thanks to the medieval builders who plundered stone from Segontium to help create Edward I’s magnificent castle at Caernarfon half-a-mile away.
Does dim diolch am hynny i'r adeiladwyr canoloesol fu’n dwyn cerrig o Segontium i helpu codi castell godidog Edward I yng Nghaernarfon hanner milltir i ffwrdd.