Published almost two centuries ago in 1823, the Diabelli Variations are more than just a major work in Ludwig van Beethoven’s oeuvre and in the history of piano music. Rather, they are among those exceptional works of music history that simply cannot be classified and – as Igor Strawinsky wrote in amazement about the Grand Fuge for string quartet composed three years later – could well have been created on a satellite in outer space. Despite only daring to première the Diabelli Variations in Berlin in 1856 and focussing on them throughout his life as an artist and publisher, Hans von Bülow was correct in his prediction that this work would provide “musical brain food for generations” – and not just for pianists and their audiences, but for music historians and theorists too. As such, countless works have been dedicated to the origins, intention, structure and (biographical) symbolism of the work – not least, in the tradition of von Bülow, by the pianists themselves, as demonstrated by the editions and statements of greats such as Artur Schnabel, Alfred Brendel and Rudolf Buchbinder.