particularly in what is now southern and eastern England. By 3000 BCE, the long barrows, causewayed enclosures, and cursuses which had predominated in the Early Neolithic were no longer built, and had been replaced by circular monuments of various kinds. These include earthen henges, timber circles, and stone circles. Stone circles are found in most areas of Britain where stone is available, with the exception of the island's south-eastern corner. They are most densely concentrated in south-western Britain and on the north-eastern horn of Scotland, near Aberdeen. The tradition of their construction may have lasted for 2,400 years, from 3300 to 900 BCE, with the major phase of building taking place between 3000 and 1,300 BCE. These stone circles typically show very little evidence of human visitation during the period immediately following their creation. This suggests that they were not sites used for rituals that left archaeologically visible evidence, but may have been deliberately left as "silent and empty monuments". The archaeologist Mike Parker Pearson suggests that in Neolithic Britain, stone was associated with the dead, and wood with the living. Other archaeologists have suggested that the stone might not represent ancestors, but rather other supernatural entities, such as deities. In the area of modern Wiltshire, various stone circles were erected, the best known of which are Avebury and Stonehenge. All of the other examples are ruined, and in some cases have been destroyed. As noted by the archaeologist Aubrey Burl, these examples have left behind "only frustrating descriptions and vague positions". Most of the known Wiltshire examples were erected on low-lying positions in the landscape. There are four smaller stone circles known from the area surrounding Avebury: The Sanctuary, Winterbourne Bassett Stone Circle, Clatford Stone Circle, and Falkner's Circle. Archaeologists initially suggested that a fifth example could be seen at Langdean Bottom, although further investigation has reinterpreted this as evidence for a late prehistoric hut circle or a medieval feature. Burl suggested that these smaller stone related to Avebury in a manner akin to "village churches within the diocese of a cathedral". Design and construction The location on which the Sanctuary was built saw prior human activity. This is reflected by a scatter of Peterborough Ware discovered by archaeologists that possibly extends for several hundred metres to the north of the monument. From its location on Overton Hill, the Sanctuary offers views of various Early Neolithic monuments in the