▁and ▁circular ▁gra ves ▁there ▁are ▁also ▁more ▁than ▁ 8 0 0 0 ▁meg al ith ic ▁structure ▁made ▁by ▁a ▁Nur ag ic ▁civil isation , ▁called ▁Nur ag he : ▁buildings ▁similar ▁to ▁to wers ▁( s ometimes ▁with ▁really ▁complex ▁structures ) ▁made ▁using ▁only ▁rocks . ▁They ▁are ▁often ▁near ▁giant ' s ▁grave ▁or ▁the ▁other ▁meg al ith ic ▁monuments . ▁ ▁The ▁French ▁Com te ▁de ▁C ay lus ▁was ▁the ▁first ▁to ▁describe ▁the ▁Car n ac ▁stones . ▁Pierre ▁Jean - B apt iste ▁L egr and ▁d ' A uss y ▁introduced ▁the ▁terms ▁men h ir ▁and ▁dol men , ▁both ▁taken ▁from ▁the ▁Bre ton ▁language , ▁into ▁anti qu arian ▁termin ology . ▁He ▁mistaken ly ▁interpreted ▁meg al ith s ▁as ▁Gall ic ▁tomb s . ▁In ▁Britain , ▁the ▁anti qu ari ans ▁A ubre y ▁and ▁Stu keley ▁conducted ▁early ▁research ▁into ▁meg al ith s . ▁In ▁ 1 8 0 5 , ▁Jacques ▁Camb ry ▁published ▁a ▁book ▁called ▁Mon uments ▁cel ti ques , ▁ou ▁recher ches ▁sur ▁le ▁cul te ▁des ▁Pier res , ▁précéd ées ▁d ' une ▁notice ▁sur ▁les ▁C elt es ▁et ▁sur ▁les ▁Dru ides , ▁et ▁suiv ies ▁d ' E t ym ologie ▁cel ti ques , ▁where ▁he ▁proposed ▁a ▁C elt ic ▁stone ▁cult . ▁This ▁un pro ven ▁connection ▁between ▁dru ids ▁and ▁meg al ith s ▁has ▁ha unted ▁the ▁public