A 1990 book about abandoned churches in Wales refers to the ancient monuments in this part of Anglesey , and calls Capel Lligwy a " medieval gesture of Christian power in a land so obviously imbued with the spirit of a pagan past " . It notes that " the wheel has turned full circle and Capel Lligwy today is just another ruined relic of a former age . " The authors describe the chapel as a " simple , square building " with a " small and ruggedly austere south chapel " , adding that the stone slabs over the vault are " almost in imitation of the ancient burial chambers which dot the surrounding landscape . "