For 10 points, name this massive set of piano variations on a theme by an Austrian publisher, a work of Ludwig van Beethoven.
Dra ts of this non-choral piece from the Wittgenstein Sketchbook are heavily cited in William Kinderman's book on this piece. At the end of this piece's penultimate section, a fortissimo diminished seventh chord and cadenza-like arpeggio are followed by six bars of Poco adagio block chords culminating in a strange E minor triad. In this piece, a section labeled "alla 'Notte e giorno faticar' di Mozart" is followed by a parody of the  nger exercises of Johann Baptist Cramer. This piece climaxes with a fugue in the foreign key of E- lat major, which transitions into a  nal minuet sometimes compared to the Arietta from the composer's 32nd piano sonata. This piece's composer allegedly used the word "Schuster leck," or "cobbler's patch", to describe the simple C major waltz on which it is based. For 10 points, name this massive set of piano variations on a theme by an Austrian publisher, a work of Ludwig van Beethoven.
Dra ts of this non-choral piece from the Wittgenstein Sketchbook are heavily cited in William Kinderman's book on this piece.
the Diabelli Variations [or 33 Variations on a Waltz by Anton Diabelli; or 33 Veränderungen über einen Walzer von Anton Diabelli]