Wilhelm Backhaus plays Beethoven, Piano Concerto No.4 – Karl Böhm, Wiener Symphoniker (1967) Music favorites Music videos Jovan Stosic November 4, 2019 Wilhelm Backhaus plays Beethoven, Piano Concerto No.4 – Karl Böhm, Wiener Symphoniker (1967) was last modified: November 4th, 2019 by Jovan Stosic