Arrangeur: Jonathan del Mar. Par BEETHOVEN LUDWIG VAN. In late 1821 Beethoven began work on his final piano sonata op. 111 which has been considered a towering masterwork ever since its publication. Thomas Mann gave it a literary monument in his novel 'Doctor Faustus' in whose musical-theoretical digressions the main motif of the 'Arietta' is set to the syllables 'Wiesengrund', the middle name of …