|Knowth (Irish: Cnobha) is the site of a Neolithic passage grave, one of the ancient monuments of the Brú na Bóinne complex in the valley of the River Boyne in Ireland. It is around a kilometre north west of the Newgrange monument and 2 km west of Dowth.|
Knowth is the largest of all passage graves situated within the Brú na Bóinne complex. The site consists of one large mound (known as Site 1) and 17 smaller satellite tombs. Essentially Knowth (Site 1) is a large mound (covering roughly a hectare) and contains two passages, placed along an east-west line. It is encircled by 127 kerbstones (3 of which are missing, 4 are badly damaged). The passages are independent of each other (they do not meet) and both lead to a burial chamber. The eastern passage leads to a cruciform chamber, not unlike that to be found at Newgrange. It contains three recesses and basin stones into which the cremated remains of the dead were placed.
The right-hand recess is larger and more elaborately decorated with megalithic art than the others, which is typical for Irish passage graves of this type. The reason for this is unknown. The western passage ends in an undifferentiated chamber (ie: it has no sides, it is a rectangular room). This chamber is separated from the passage by a sillstone. The chamber seems to have also contained a basin stone. This was later removed and is now located about two thirds down the passageway.