▁L amm erm oor , ▁La ▁bo h ème , ▁Un ▁bal lo ▁in ▁mas ch era ▁and ▁La ▁tra vi ata . ▁In ▁ 1 9 7 6 ▁he ▁was ▁cast ▁in ▁R igo let to , ▁directed ▁by ▁Roman ▁Pol ans ki , ▁at ▁the ▁Bav arian ▁State ▁Opera . ▁Sing ing ▁in ▁Düsseldorf , ▁Stuttgart , ▁München , ▁Berlin ▁and ▁Ludwig s burg , ▁Mold ove anu ▁was ▁discovered ▁by ▁Nel ly ▁Walter , ▁vice - pres ident ▁of ▁Columbia ▁Art ists ▁Management , ▁who ▁became ▁his ▁manager ▁for ▁eleven ▁years ▁and ▁who ▁proposed ▁him ▁at ▁the ▁Metropolitan ▁Opera ▁in ▁New ▁York . ▁In ▁ 1 9 7 9 , ▁he ▁made ▁his ▁debut ▁at ▁Cov ent ▁Garden , ▁London , ▁in ▁Don ▁Carlos , ▁directed ▁by ▁L uch ino ▁Vis cont i . ▁ ▁In ▁ 1 9 7 7 , ▁Mold ove anu ▁was ▁named ▁K amm ers änger ▁by ▁the ▁Stuttgart ▁Opera . ▁ ▁His ▁first ▁appearance ▁at ▁the ▁Metropolitan ▁Opera ▁took ▁place ▁on ▁ 1 9 ▁May ▁ 1 9 7 7 , ▁during ▁a ▁tour ▁of ▁the ▁company ▁in ▁Min ne apolis , ▁Minnesota . ▁He ▁appeared ▁as ▁Rod ol fo ▁in ▁La ▁bo h ème , ▁with ▁M imi ▁played ▁by ▁Ren ata ▁Sc otto , ▁with ▁whom ▁he ▁was ▁to ▁sing ▁in ▁several ▁oper as . ▁At ▁the ▁Metropolitan , ▁he ▁sang ▁in ▁ 1 0 5 ▁performances , ▁more ▁than ▁any ▁other ▁Roman ian ▁ten or ; ▁he ▁is ▁also ▁the ▁Roman