▁n iche ▁left : ▁St ▁Peter ▁ ▁( Christ ▁and ▁the ▁Sam ar itan ) ▁ ▁Organ , ▁pres by tery ▁and ▁high ▁alt ar ▁On ▁the ▁left ▁of ▁the ▁High ▁Alt ar ▁is ▁the ▁organ . ▁ ▁The ▁present ▁organ ▁( by ▁the ▁B azz ari ▁brothers ) ▁was ▁subst it uted ▁in ▁ 1 8 5 6 ▁for ▁the ▁original ▁organ ▁of ▁ 1 7 4 0 . ▁ ▁On ▁the ▁right ▁of ▁the ▁High ▁Alt ar ▁is ▁the ▁pres by tery ▁with ▁a ▁small ▁early ▁painting ▁of ▁the ▁Madonna ▁and ▁Child ▁on ▁a ▁gold ▁ground . ▁This ▁is ▁by ▁Stef ano ▁di ▁Sant ' A gn ese ▁and ▁is ▁thought ▁to ▁date ▁from ▁ 1 3 7 5 – 8 0 . ▁It ▁probably ▁came ▁from ▁the ▁former ▁church ▁of ▁St . ▁Ag nes ▁( of ▁which ▁the ▁artist ▁was ▁a ▁parish ion er ), ▁which ▁was ▁nearby , ▁and ▁is ▁an ▁example ▁of ▁the ▁International ▁Goth ic ▁style ▁The ▁church ▁of ▁St . ▁Ag nes ▁was ▁suppress ed ▁in ▁ 1 8 1 0 . ▁ ▁The ▁High ▁Alt ar ▁stands ▁at ▁the ▁top ▁of ▁five ▁steps ▁under ▁an ▁architect ural ▁can opy ▁supported ▁by ▁columns , ▁under ne ath ▁the ▁cup ola . ▁The ▁alt ar ▁beneath ▁is ▁in ▁a ▁ro c oco ▁style ▁with ▁col oured ▁mar bles ▁and ▁car ved ▁shell s , ▁heads ▁of ▁ang els ▁and ▁relief s ▁of ▁ros es , ▁ears ▁of ▁corn ▁and ▁g rap es . ▁ ▁Ch oir ▁