Addington Long Barrow is a chambered long barrow located near the village of Addington in the southeastern English county of Kent. Probably constructed in the fourth millennium BCE, during Britain's Early Neolithic period, today it survives only in a ruined state. Built of earth and about fifty local sarsen megaliths, the long barrow consisted of a sub-rectangular earthen tumulus enclosed by kerb-stones. Collapsed stones on the northeastern end of the chamber probably once formed a stone chamber in which human remains might have been deposited, though none have been discovered. Archaeologists have established that the monument was built by pastoralist communities shortly after the introduction of agriculture to Britain from continental Europe. Although representing part of an architectural tradition of long barrow building that was widespread across Neolithic Europe, Addington Long Barrow belongs to a localised regional variant of barrows produced in the vicinity of the River Medway, now known as the Medway Megaliths. Of these, it lies near to both Chestnuts Long Barrow and Coldrum Long Barrow on the western side of the river. Two further surviving long barrows, Kit's Coty House and Little Kit's Coty House, as well as the destroyed Smythe's Megalith and possible survivals such as the Coffin Stone and White Horse Stone, are located on the Medway's eastern side. After the Early Neolithic, the long barrow fell into ruins, with a small road being built through the centre of the monument by the 19th century at the latest. Local folklore grew up around the site, associating it with the countless stones motif. The ruin attracted the interest of antiquarians in the early 18th century, and was studied by local archaeologists in the 20th. Both it and the nearby Chestnuts Long Barrow are on private land and are no longer (as of October 2019) accessible to the public. Location The monument lies approximately north of Addington Parish Church. It is accessible from the A20 via two minor roads. The area in which the barrow is located is sometimes termed Addington Park. The site is privately owned, although it is visible from a road that cuts through the middle of the barrow. Geologically, it is located on the Lower Greensand. Context The Early Neolithic was a revolutionary period of British history. Between 4500 and 3800 BCE, it saw a widespread change in lifestyle as the communities living in the British Isles adopted agriculture as their primary form