The term 'Circle of Stones' is a reference to Stonehenge, a prehistoric monument located in Wiltshire, England. It is believed to have been constructed between 3000 and 2000 BC and consists of a circular arrangement of large stones. The term 'Henge' is derived from the Old English word meaning 'HINGE' and is used to describe a circular or oval-shaped earthwork consisting of a ditch and an external bank. Stonehenge is considered to be one of the most famous examples of a henge.