▁approximately ▁ 3 0 0 ▁t onnes ▁each . ▁The ▁tall est ▁retain ing ▁wall , ▁on ▁the ▁west , ▁has ▁a ▁second ▁course ▁of ▁mon ol ith s ▁containing ▁the ▁f amed ▁" Three ▁St ones " ▁( , ▁Tr í l ith on ) :: ▁cut ▁from ▁lim estone , ▁meas uring ▁over ▁ ▁long , ▁ ▁high , ▁and ▁ ▁broad , ▁they ▁we igh ▁approximately ▁ 8 0 0 ▁t onnes ▁each . ▁( A ▁fourth , ▁still ▁larger ▁stone ▁called ▁the ▁Stone ▁of ▁the ▁P reg nant ▁Woman ▁lies ▁un used ▁in ▁the ▁nearby ▁quar ry ▁ ▁from ▁the ▁town ▁and ▁we igh s ▁around ▁ 1 0 0 0 ▁t onnes . ▁A ▁fifth , ▁we igh ing ▁approximately ▁ 1 2 0 0 ▁t onnes ▁lies ▁in ▁the ▁same ▁quar ry .) ▁ ▁Through ▁the ▁foundation ▁there ▁run ▁three ▁enorm ous ▁pass ages ▁the ▁size ▁of ▁railway ▁t unn els . ▁ ▁A ▁wide ▁st air case ▁provided ▁access ▁to ▁the ▁elev ated ▁platform , ▁which ▁measured ▁ ▁on ▁top . ▁The ▁Temple ▁of ▁Jup iter ▁proper ▁was ▁circ led ▁by ▁a ▁per ist yle ▁of ▁ 5 4 ▁un fl uted ▁Cor inth ian ▁columns : ▁ten ▁in ▁front ▁and ▁back ▁and ▁nin ete en ▁along ▁each ▁side . ▁The ▁columns ▁were ▁ 1 9 . 9 ▁meters ▁high , ▁the ▁tall est ▁of ▁any ▁classical ▁temple , ▁and ▁the ▁a pe x ▁of ▁the ▁ped iment ▁is ▁estimated ▁to ▁have ▁been ▁ 4 4