Circles of elaborately carved stones from about 9,500BC predate even agriculture
http://www.guardian.co.uk/science/2008/apr/23/archaeology.turkey
also http://en.wikipedia.org/wiki/G%C3%B6bekli_Tepe
http://www.guardian.co.uk/science/2008/apr/23/archaeology.turkey
also http://en.wikipedia.org/wiki/G%C3%B6bekli_Tepe