Dear Sena Jurinac left us this week, at the age of 90. She was a legendary singer, known for her many fine portrayals of Mozart roles. See the Wikipedia bio-blurb here.
I can't stop watching and listening to this, where she is singing Oktavian to the equally heavenly Anneliese Rothenberger as Sophie:
Donna Elvira, 1962, ROH Covent Garden, Georg Solti cond.:
Tosca, 1966, Wiener Stadtsoper, Andre Cluytens, cond.