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Avebury is a Neolithic henge monument containing three stone circles, around the village of Avebury in Wiltshire, in southwest England. Unique amongst megalithic monuments, Avebury contains the largest stone circle in Europe, and is one of the best known prehistoric sites in Britain. It is both a tourist attraction and a place of religious importance to contemporary Pagans.

Constructed around 2600 BCE, during the Neolithic, or 'New Stone Age', the monument comprises a large henge (that is a bank and a ditch) with a large outer stone circle and two separate smaller stone circles situated inside the centre of the monument. Its original purpose is unknown, although archaeologists believe that it was most likely used for some form of ritual or ceremony. The Avebury monument was a part of a larger prehistoric landscape containing several older monuments nearby, including West Kennet Long Barrow and Silbury Hill.

By the Iron Age, the site had been effectively abandoned, with some evidence of human activity on the site during the Roman occupation. During the Early Medieval, a village first began to be built around the monument, which eventually extended into it. In the Late Medieval and Early Modern periods, locals destroyed many of the standing stones around the henge, both for religious and practical reasons. The antiquarians John Aubrey and William Stukeley however took an interest in Avebury during the 17th century, and recorded much of the site before its destruction. Archaeological investigation followed in the 20th century, led primarily by Alexander Keiller, who oversaw a project of reconstructing much of the monument.

The National Trust for Places of Historic Interest or Natural Beauty, usually known as the National Trust, is a conservation organisation in England, Wales and Northern Ireland. The Trust does not operate in Scotland, where there is an independent National Trust for Scotland.

According to its website:

The trust owns many heritage properties, including historic houses and gardens, industrial monuments and social history sites. It is one of the largest landowners in the United Kingdom, owning many beauty spots, most of which are open to the public free of charge. It is the largest membership organisation in the United Kingdom, and one of the largest UK charities by both income and assets.

England (ⁱ/ˈɪŋɡlənd/) is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west. The Irish Sea lies north west of England, whilst the Celtic Sea lies to the south west. The North Sea to the east and the English Channel to the south separate it from continental Europe. Most of England comprises the central and southern part of the island of Great Britain in the North Atlantic. The country also includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight.