▁with ▁flowers ▁and ▁leaves . ▁The ▁crossing ▁is ▁covered ▁with ▁a ▁d ome ▁with ▁a ▁representation ▁of ▁the ▁Holy ▁Spirit ▁in ▁its ▁middle . ▁ ▁The ▁main ▁alt ar ▁was ▁commission ed ▁by ▁Card inal ▁N eri ▁C ors ini ▁and ▁designed ▁by ▁the ▁architect ▁Nicola ▁Sal vi . ▁He ▁made ▁it ▁into ▁an ▁elegant ▁and ▁ref ined ▁synth esis ▁of ▁mar ble ▁and ▁g ild ed ▁metal . ▁The ▁top ▁of ▁the ▁alt ar ▁rest s ▁on ▁an ▁ur n ▁in ▁por phy ry ▁ros so ▁ant ico , ▁the ▁cost ly ▁stone ▁of ▁the ▁anci ents , ▁that ▁contains ▁the ▁put ative ▁re lic s ▁of ▁Saint ▁E ust ace . ▁The ▁alt arp ie ce ▁was ▁painted ▁in ▁ 1 7 2 7 ▁by ▁Francesco ▁Ferdinand i ▁( 1 6 7 9 – 1 7 4 0 ), ▁also ▁named ▁" l ' Im per iali ". ▁It ▁represents ▁the ▁mart yr dom ▁of ▁Saint ▁E ust ace ▁and ▁his ▁family ▁who ▁were ▁ro asted ▁to ▁death ▁inside ▁a ▁bronze ▁statue ▁of ▁a ▁b ull ▁or ▁an ▁ox , ▁in ▁the ▁year ▁AD ▁ 1 1 8 . ▁The ▁g ild ed ▁wooden ▁bald ach in ▁( cir ca ▁ 1 7 4 6 ) ▁over ▁the ▁main ▁alt ar ▁is ▁attributed ▁to ▁Ferd in ando ▁F uga ▁( 1 6 9 9 – 1 7 8 1 ). ▁ ▁The ▁rear ▁of ▁the ▁church ▁is ▁almost ▁completely ▁covered ▁with ▁the ▁organ , ▁made ▁by ▁Johann ▁Con rad ▁Wer le