Wilhelm Backhaus (or ‘Bachaus’) (March 26, 1884 – July 5, 1969) was a German pianist and pedagogue.
He was particularly well known for his interpretations of Beethoven and romantic music such as that by Brahms. He was also much admired as a chamber musician. He was an enthusiastic user of Bechstein pianos. He seems to have favored Boesendorfer pianos as he can be seen playing this instrument in commercial videos with Boehm and Knappertsbusch conducting. Also see his original photograph and handwritten letter of appreciation of the Boesendorfer in their main showroom in Vienna.