Wilhelm Walter Friedrich Kempff (25 November 1895 – 23 May 1991) 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. He recorded the complete collection of their piano sonatas. 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.
Kempff was born in Jüterbog, Brandenburg, in 1895. He grew up in nearby Potsdam where his father was a royal music director and organist at St. Nicolai Church. His grandfather was also an organist and his brother Georg became director of church music at the University of Erlangen. Kempff studied music at first at the Berlin Hochschule für Musik at the age of nine after receiving lessons from his father at a younger age. Whilst there he studied composition with Robert Kahn and piano with Karl Heinrich Barth (with whom Arthur Rubinstein also studied). In 1914 Kempff moved on to study at the Viktoria gymnasium in Potsdam before returning to Berlin to finish his training.
In 1917, Kempff gave his first major recital, consisting of predominantly major works, including Beethoven's Hammerklavier Sonata and Brahms Variations on a theme of Paganini. Kempff toured widely in Europe and much of the rest of the world. Between 1936 and 1979 he performed ten times in Japan (a small Japanese island was named Kenpu-san in his honor). Kempff made his first London appearance in 1951 and his first in New York in 1964. He gave his last public performance in Paris in 1981, and then retired for health reasons (Parkinson's Disease). He died in Positano, Italy, in 1991 at the age of 95, five years after his wife, whom he had married in 1926. They were survived by seven children.