▁of ▁the ▁Sea ▁Pe op les . ▁ ▁Geographic ▁distribution ▁of ▁meg al ith s ▁ ▁Meg al ith ic ▁sites ▁in ▁Turkey ▁ ▁Gö bek li ▁Te pe ▁At ▁a ▁number ▁of ▁sites ▁in ▁sout he astern ▁Turkey , ▁cer emon ial ▁complex es ▁with ▁large ▁T - sh aped ▁meg al ith ic ▁orth ost ats , ▁d ating ▁from ▁the ▁Pre - P ot tery ▁Ne ol ith ic ▁( P PN , ▁c . ▁ 9 6 0 0 – 7 0 0 0 ▁cal ▁BC ), ▁have ▁been ▁discovered . ▁At ▁the ▁most ▁famous ▁of ▁these ▁sites , ▁Gö bek li ▁Te pe , ▁parts ▁of ▁the ▁oldest ▁level ▁( III ) ▁have ▁been ▁C 1 4 - dated ▁as ▁far ▁back ▁as ▁to ▁the ▁mid - 1 0 th ▁mill en ni um ▁BC ▁( cal ). ▁On ▁this ▁level , ▁ 2 0 ▁great ▁stone ▁circles ▁( up ▁to ▁ 2 0 ▁meters ▁in ▁diameter ) ▁with ▁standing ▁stones ▁up ▁to ▁ 7 ▁meters ▁high ▁have ▁been ▁identified . ▁At ▁least ▁ 5 ▁of ▁these ▁circles ▁have ▁so ▁far ▁( per ▁ 2 0 1 9 ) ▁been ▁exc av ated . ▁Many ▁of ▁the ▁standing ▁stones ▁are ▁rich ly ▁orn ament ed ▁with ▁car ved ▁relief s ▁of ▁"[ b ] ears , ▁bo ars , ▁sn akes , ▁fo xes , ▁wild c ats , ▁au ro chs , ▁gaz elle , ▁quad ru ped ▁re pt iles , ▁birds , ▁sp iders ,