Lligwy Burial Chamber is a very robust, Neolithic chamber. The eight uprights which support the massive capstone are larger than they at first appear, because half of their height is buried in the ground. The capstone is about long and wide, with a thickness of around . It is estimated to weigh about and is in contact with only three of the uprights. A gap between the uprights on the eastern side probably indicates where an entrance passage stood, with a way out of the mound; It is unclear whether this chambered tomb was covered by a cairn, but if it was, no trace remains today. Deep grooves in the limestone capstone imply that erosion by rainfall has taken place, further evidence that the structure may not have been covered by a cairn. Excavations in 1909 discovered artefacts in two separate layers, indicating that the site was used during two separate periods. The bones from up to thirty people have been found in the chamber, as well as shellfish (
mussels and
limpets) and many animal bones. Fragments of pottery from the two different settlements periods are present;
grooved ware dating to the
Neolithic period and
beaker ware from the early
Bronze Age. Lligwy Burial Chamber is a
scheduled ancient monument. The
Royal Commission on the Ancient and Historical Monuments of Wales curates the archaeological, architectural and historic records for this site. Included in the archives are many digital images of the site, a DOE photographic collection, NMR site files, Cadw guardianship records, colour photographs, black and white photographs, aerial photographs and an extract from the June 1933 edition of
Archaeologia Cambrensis with the title "The Pottery from the Lligwy Burial Chamber, Anglesey". ==Media==