ody , ▁harm onic ▁and ▁instrument al ▁colour , ▁and ▁dram atic ▁form . ▁In ▁ 1 8 2 4 ▁he ▁was ▁contract ed ▁by ▁the ▁Op éra ▁in ▁Paris , ▁for ▁which ▁he ▁produced ▁an ▁opera ▁to ▁celebr ate ▁the ▁coron ation ▁of ▁Charles ▁X , ▁Il ▁vi aggio ▁a ▁Re ims ▁( l ater ▁can n ib al ised ▁for ▁his ▁first ▁opera ▁in ▁French , ▁Le ▁comte ▁O ry ), ▁revis ions ▁of ▁two ▁of ▁his ▁Italian ▁oper as , ▁Le ▁siège ▁de ▁Cor int he ▁and ▁Mo ï se , ▁and ▁in ▁ 1 8 2 9 ▁his ▁last ▁opera , ▁Guillaume ▁Tell . ▁ ▁Ross ini ' s ▁withdraw al ▁from ▁opera ▁for ▁the ▁last ▁ 4 0 ▁years ▁of ▁his ▁life ▁has ▁never ▁been ▁fully ▁explained ; ▁contrib ut ary ▁factors ▁may ▁have ▁been ▁ill - he alth , ▁the ▁wealth ▁his ▁success ▁had ▁brought ▁him , ▁and ▁the ▁rise ▁of ▁spect ac ular ▁grand ▁opera ▁under ▁compos ers ▁such ▁as ▁Gia como ▁Meyer be er . ▁From ▁the ▁early ▁ 1 8 3 0 s ▁to ▁ 1 8 5 5 , ▁when ▁he ▁left ▁Paris ▁and ▁was ▁based ▁in ▁Bolog na , ▁Ross ini ▁wrote ▁relatively ▁little . ▁On ▁his ▁return ▁to ▁Paris ▁in ▁ 1 8 5 5 ▁he ▁became ▁ren owned ▁for ▁his ▁musical ▁sal ons ▁on ▁S atur days , ▁regularly ▁attended ▁by ▁mus icians ▁and ▁the ▁art istic ▁and ▁fashion able ▁circles ▁of ▁Paris , ▁for ▁which ▁he ▁wrote ▁the ▁entertain