On This Day...
...back in 1911 was the premiere of Richard Strauss' neo-classical masterpiece, Der Rosenkavalier in Dresden.
Musically a far cry from the atonality of his previous Elektra, Der Rosenkavalier contains some of the most ravishing music ever written for the female voice. The Final Trio in particular and you can see a snippet on Youtube.
This image is of Elizabeth Schwarzkopf as Die Marschallin, one of the most famous exponents of the role, and is indeed in the accompanying Youtube link.