Castlerigg Stone Circle may be well over 700 years older than the Pyramids of Giza. It may be... the OLDEST stone circle in Britain!
Key sources mentioned:
Clare, T., The Prehistoric Monuments of the Lake District, History Press (2007)
Oswald, A and Durgeat, C. A new survey of The Carles stone circle, Castlerigg, Cumbria. In Hey G., and Frodsham, P. New Light on the Neolithic of Northern England, 203-9. (2021).