Aria: Dormono Entrambi Opera: Norma Composer: Vincenzo Bellini Performer (principal): Maria Callas Performance: 1952 Covent Garden Misc: This is a fiendishly difficult aria because of the need for tremendous breath control. Norma is brooding over her two children, wondering if she should kill them for being Pollione's. In the end, as she raises her knife, she realizes she can't do it. The leap from plangent bel canto lyricism to drama is one that very few sopranos have managed satisfactorily.