My beloved mezzo, Rita Gorr.

She left us two years ago,  on Jan 22nd.
So far, for me, her voice is unmatched.

"Adieu, beau ciel d'Afrique, astres que j'admirais
Aux nuits d'ivresse et d'extase infinie;
Je ne vous verrai plus, ma carrière est finie."(Lyrics quoted from Art Song) 

Les Troyens, Hector Berlioz. 

One of my favorite aria sung by Rita Gorr:

(Many thanks for both Youtube uploaders who make this artist live for ever).