Galina Vishnevskaya -- oh, my goodness gracious. Her voice! I'm fond of several lyric sopranos, but this voice! It is rock-solid. I've never heard anything like this before in a singer. Her expressive intrepidity. And how she inhabits this Russian stuff! -- Mussorgsky's "Songs and Dances of Death" seems to be part of her spiritual DNA here.
If you click on the "Show More" thing, a drop-down section contains the Russian lyrics, with English translation following.