Here is the Wikipedia bio about her remarkable life and career.
How could I not be enamored with singing like this?
Singing "In si barbara" from Semiramide, in a made-for-TV feature called "Rossini at Versailles", 1985 (apologies for the poor video quality):
And in 1991 under James Conlon (theater uncredited):
Liber sriptus from Mr. Verdi's Requiem, of which, you might recall, I am somewhat fond (Orchestre e Coro de la RAI de Roma. Claudio Abbado conductor. October 10, 1970):
One of her greatest roles, opposite one of her favorite costars, Joan Sutherland, on a 1970 TV show:
An early audio recording--as Beethoven's Leonore!
And as Brünnhilde (Götterdämmerung)!