▁H elles pont ine ▁Sib yl ▁on ▁the ▁right , ▁both ▁identified ▁by ▁ins cri ptions ▁on ▁their ▁ped est als . ▁ ▁The ▁Sib yl ▁was ▁thought ▁to ▁have ▁proph es ied ▁the ▁coming ▁of ▁Christ ▁and ▁his ▁cru c if ix ion . ▁ ▁A ▁put to - angel ▁with ▁a ▁fl aming ▁tor ch ▁ill umin ates ▁the ▁scene , ▁which ▁is ▁dark ▁and ▁evidently ▁set ▁at ▁night . ▁In ▁particular ▁his ▁tor ch ▁reve als ▁the ▁gold ▁m osa ic ▁in ▁the ▁semi - d ome ▁of ▁the ▁n iche , ▁where ▁in ▁the ▁centre ▁a ▁pel ican ▁fe eds ▁its ▁young ▁by ▁pe ck ing ▁its ▁own ▁breast ▁to ▁draw ▁blood , ▁a ▁phenomen on ▁believed ▁since ▁classical ▁times ▁in ▁traditional ▁zo ology , ▁which ▁had ▁become ▁a ▁common ▁visual ▁symbol ▁of ▁the ▁Pass ion ▁of ▁Christ ▁and ▁its ▁re dem pt ive ▁effects ▁for ▁man . ▁ ▁In ▁the ▁bottom ▁right ▁corner ▁a ▁small ▁ex ▁v oto ▁picture ▁is ▁pro pped ▁up ▁against ▁the ▁base ▁of ▁the ▁right - hand ▁statue . ▁ ▁It ▁shows ▁two ▁men ▁kne eling ▁in ▁prayer ▁to ▁a ▁Piet à ▁in ▁the ▁air . ▁ ▁These ▁are ▁agreed ▁to ▁represent ▁Tit ian ▁and ▁his ▁son ▁O raz io , ▁probably ▁pray ing ▁to ▁be ▁sp ared ▁from ▁the ▁pl ague ▁that ▁in ▁fact ▁killed ▁them ▁both , ▁a ▁full ▁year ▁after ▁it ▁arrived ▁in ▁Ven ice . ▁Be hind ▁the ▁picture , ▁and ▁partly ▁conce aled ▁by ▁it , ▁is ▁a ▁small