Knowth Kerbstone K92

Knowth Kerbstone K92

The stone is greywacke, a type of sandstone composed of tightly cemented mineral grains and rock fragments. Much of the surface has been weathered, with the carving restricted to the smoother upper right corner. The design consists of a penannular circle with an outer arc and two nearby short lines, all worked with a medium sized, rounded point.

Knowth Stone Age Passage Tomb

Knowth is a Stone Age Passage Tomb in the Boyne Valley and with Newgrange and Dowth makes up the Brú na Bóinne UNESCO World Heritage Site. Knowth is the largest passage tomb of the Brú na Bóinne complex. The site consists of a large mound (known as Site 1) and 17 smaller satellite tombs. The mound is about 12 meters (40 ft) high and 67 meters (220 ft) in diameter covering about 1 hectare (2.5 acres). It contains two passages placed along an east-west line and was originally encircled by 127 kerbstones of which 124 are still in place.

Aerial view of Knowth passage tomb and smaller satellite tombs

The large mound is estimated to date to around 3200 BCE, placing it in the Late Neolithic period. The passages are independent of each other, each leading to its own burial chamber. The eastern passage opens into a cruciform chamber, comparable in form to that at Newgrange. It contains three recesses with basin stones into which cremated human remains were placed. The right hand recess is larger and more elaborately decorated with megalithic art than the others, a feature characteristic of the eastern chamber at Knowth.

The western passage ends in an undifferentiated chamber, defined by a widening of the passage rather than a fully developed cruciform plan. This chamber is separated from the passage by a sillstone and originally contained a basin stone, which was later removed and is now located approximately two thirds of the way back along the passage.