Knowth Kerbstone K11, the entrance stone of the Eastern Tomb. The greywacke stone is 3 meters (10 foot) long, greywacke is a type of coarse sandstone. The central groove on the stone is directly in line with the standing stone outside as well as the long passage within.

Knowth is a Stone Age Passage Tomb in the Boyne Valley in Ireland's Ancient East and together with Newgrange and Dowth are the principal sites of Brú na Bóinne UNESCO World Heritage Site. Knowth is the largest passage tomb of the Brú na Bóinne complex. The main mound is about 12 metres (40 ft) high and 67 metres (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.

Boyne Valley Private Day Tour

Immerse yourself in the rich heritage and culture of the Boyne Valley with our full-day private tours. Visit Newgrange World Heritage site, explore the Hill of Slane, where Saint Patrick famously lit the Paschal fire. Discover the Hill of Tara, the ancient seat of power for the High Kings of Ireland. Book Now