Christa Ludwig, Lisa Otto, Josef Greindl, and Martin Vantin sing the quartet from Fidelio (1963)—surely one of the greatest musical compositions of all time.

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Christa Ludwig, Lisa Otto, Josef Greindl, and Martin Vantin sing the quartet from Fidelio (1963)—surely one of the greatest musical compositions of all time.
Josef Greindl, Anja Silja, Wolfgang Windgassen, Erwin Wohlfahrt, and Ruth Hesse sing the Quintet from Die Meistersinger von Nürnberg in Wieland Wagner's legendary Bayreuth production; Thomas Schippers conducts (1963)
Die Meistersinger is my least favorite Wagner opera; in fact, it is a work I positively dislike, although I admit that it certainly has its moments (the Quintet is one). As usual, Silja's voice is none of the sweetest, but her breath control and stage presence are amazing, as is Greindl's deeply moving Sachs.
Josef Greindl and Gustav Neidlinger sing Götterdämmerung