UNESCO World Heritage Site | |
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Location | Wiltshire, United Kingdom |
Part of | Avebury Section of Stonehenge, Avebury and Associated Sites |
Criteria | Cultural: (i), (ii), (iii) |
Reference | 373bis-002 |
Inscription | 1986 (10th Session) |
Extensions | 2008 |
Coordinates | 51°26′30″N 1°52′34″W / 51.44153°N 1.87622°W |
Windmill Hill is a Neolithic causewayed enclosure in the English county of Wiltshire, part of the Avebury World Heritage Site, about 1 mile (2 km) northwest of Avebury. Enclosing an area of 21 acres (8.5 ha), it is the largest known causewayed enclosure in Britain.[1] The site was first occupied around 3800 BC, although the only evidence is a series of pits apparently dug by an agrarian society using Hembury pottery.[citation needed]
During a later phase, c. 3700 BC,[2] three concentric segmented ditches were placed around the hilltop site, the outermost with a diameter of 365 metres.[citation needed] The causeways interrupting the ditches vary in width from a few centimetres to 7 m. Material from the ditches was piled up to create internal banks; the deepest ditches and largest banks are on the outer circuit. In the same period there was also a rectangular mortuary enclosure.[3]
The site was designated as a scheduled monument in 1925.[3] It came into the ownership of the National Trust in 1942[4] and is under the guardianship of English Heritage.[5]