Bryn Celi Dhu

Bryn Celli Ddu (‘Mound in the Dark Grove’), is a Late Neolithic passage tomb dating to around 5,000 years ago and locted on the island of Anglesey in north west Wales. A particular feature of the tomb is that on the summer solstice a beam of light is cast down the passage, lighting up the chamber. The monument appears to have begun as a ‘henge’ or a ritual enclosure. It consisted of a bank (now lost) around an inner ditch, which enclosed a circle of upright stones. The ditch originally measured 21 meters in diameter. The outer edge can still be seen and a number of stones from the inner stone circle also survive. A decorated pattern stone was discovered near a ceremonial pit at the back of the chamber. A replica of the stone has been set up at the site. The tomb is off the A4080 about a mile south of Llanfair in Anglesey.