Avebury is a Neolithic henge monument containing three stone circles, around the village of Avebury in Wiltshire, in south-west England. One of the best-known prehistoric sites in Britain, it contains the largest megalithic stone circle in the world. It is both a tourist attraction and a place of religious importance to contemporary pagans.

The Neolithic period in the British Isles lasted from c. 4100 to c. 2,500 BC. Constituting the final stage of the Stone Age in the region, it was preceded by the Mesolithic and followed by the Bronze Age.