9 5 7 ▁and ▁ 1 9 8 3 ▁including ▁Leon ora ▁in ▁La ▁for za ▁del ▁dest ino , ▁Elis ab etta ▁in ▁Don ▁Carlos , ▁the ▁title ▁role ▁in ▁A ida , ▁Lady ▁Mac b eth ▁in ▁Mac b eth , ▁the ▁title ▁role ▁in ▁Norm a , ▁Ott avia ▁in ▁L ' in cor on azione ▁di ▁Po ppe a ▁and ▁Alc este . ▁At ▁La ▁Scala , ▁she ▁also ▁appeared ▁as ▁the ▁First ▁Woman ▁of ▁Can ter bury ▁in ▁the ▁world ▁premi ere ▁of ▁P izz etti ' s ▁L ' ass ass in io ▁nella ▁c atted rale ▁in ▁ 1 9 5 8 . ▁In ▁ 1 9 6 0 , ▁she ▁tou red ▁the ▁USS R , ▁singing ▁concert s ▁in ▁Moscow ▁and ▁B aku . ▁ ▁In ▁ 1 9 6 2 , ▁she ▁deb uted ▁at ▁the ▁Royal ▁Opera ▁House , ▁Cov ent ▁Garden ▁as ▁Elis ab etta ▁di ▁Val ois ▁in ▁Don ▁Carlos ▁and ▁Don na ▁Anna ▁in ▁Don ▁Giovanni . ▁Her ▁United ▁States ▁debut ▁had ▁been ▁at ▁the ▁San ▁Francisco ▁Opera ▁in ▁ 1 9 5 6 , ▁as ▁Frances ca ▁in ▁Z andon ai ' s ▁Frances ca ▁da ▁R im ini . ▁She ▁sang ▁in ▁other ▁American ▁opera ▁houses ▁as ▁well , ▁but ▁never ▁at ▁the ▁Metropolitan ▁Opera , ▁despite ▁discuss ions ▁about ▁her ▁being ▁engaged ▁to ▁sing ▁T os ca ▁there , ▁also ▁in ▁ 1 9 5 6 . ▁ ▁She ▁sang ▁Ch op in ' s ▁Polish