King Doniert’s Stone consists of two pieces of a decorated 9th century cross. The inscription is believed to commemorate Dungarth, King of Cornwall who died in 876.
In 1999 there was some controversy regarding this site and others under the care of the English Heritage organisation. Members of a pressure group, the Revived Cornish Stannary Parliament, stole several signs bearing the English Heritage name. Since this action several of the smaller sites such as Dupath Well, The Hurlers (stone circles), Tregiffian Burial Chamber, St Breock Downs Monolith, King Doniert’s Stone, Trethevy Quoit and Carn Euny have been transferred to the care of the Cornwall Heritage Trust.