▁com edic ▁roles . ▁He ▁made ▁his ▁professional ▁opera ▁debut ▁as ▁Fernando ▁in ▁Don iz etti ' s ▁La ▁favorite ▁at ▁the ▁Teatro ▁Don iz etti ▁in ▁Berg amo ▁in ▁ 1 9 1 4 . ▁He ▁created ▁the ▁role ▁of ▁Pr un ier ▁in ▁the ▁original ▁ 1 9 1 7 ▁production ▁of ▁Pu cc ini ' s ▁La ▁rond ine ▁at ▁the ▁Grand ▁Thé âtre ▁de ▁Monte ▁Carlo , ▁a ▁role ▁which ▁he ▁performed ▁at ▁many ▁other ▁opera ▁houses ▁including ▁the ▁Teatro ▁Comun ale ▁di ▁Bolog na . ▁Over ▁the ▁next ▁several ▁years ▁he ▁played ▁mostly ▁leading ▁roles ▁at ▁the ▁Teatro ▁Cost an zi ▁in ▁Rome ▁including ▁Rod ol fo ▁in ▁Pu cc ini ' s ▁La ▁Boh ème , ▁F ent on ▁in ▁Ver di ' s ▁Fal st aff , ▁and ▁the ▁Ern esto ▁in ▁Don iz etti ' s ▁Don ▁Pas qu ale . ▁In ▁the ▁early ▁ 1 9 2 0 s ▁he ▁joined ▁the ▁ro ster ▁at ▁La ▁Scala ▁where ▁he ▁began ▁playing ▁more ▁buff o ▁roles ▁than ▁leading ▁roles . ▁In ▁ 1 9 2 1 , ▁he ▁sang ▁the ▁role ▁of ▁doctor ▁C aj us ▁in ▁Ver di ' s ▁Fal st aff ▁at ▁La ▁Scala ▁and ▁in ▁ 1 9 2 2 ▁was ▁Filip eto ▁in ▁the ▁company ' s ▁first ▁production ▁of ▁Er mann o ▁Wolf - F err ari ' s ▁I ▁quattro ▁rust eg hi . ▁In ▁ 1 9 2 6 ▁he ▁created ▁the ▁role ▁of ▁Emperor ▁Alt ou