Wilhelm Walter Friedrich Kempff was a German pianist and composer. Although his repertoire included Bach, Mozart, Chopin, Schumann, Liszt and Brahms, Kempff was particularly well known for his interpretations of the music of Ludwig van Beethoven and Franz Schubert, recording the complete sonatas of both composers. He is considered to have been one of the chief exponents of the Germanic tradition during the 20th century and one of the greatest pianists of all time.