Interesting Facts about the Piano: Christie's Auction House recently sold a Vicorian Steinway grand piano for $1.2 MILLION DOLLARS! The piano was sold to the Sterling and Francine Clark Art Institute of Williamstown, Massachusetts. The total string tension in a concert grand is close to Thirty Tons! That a boxed model D Steinway Grand Piano weighs 1400 Pounds ! That six Steinways are now in the Smithsonian collection. The working section of the piano is called the action. There are about 7500 parts here, all playing a role in sending the hammers against the strings when keys are struck. A new piano should be tuned four times the first year, with the change of seasons, and at least twice a year after that. There are over 10 MILLION pianos in American homes, businesses, and institutions.