Sound of Harmony is the world's most expensive grand piano, a Steinway & Sons art case piano built by Steinway's factory in Hamburg, Germany, in 2008 for €1.2 million. ^[1] It took Steinway about four years to build the piano. ^[1] The piano is decorated with inlays of 40 different woods, including the lid which replicates artwork by Chinese painter Shi Qi. ^{[2] [3]} The piano is owned by the art collector Guo Qingxiang and was chosen for use at the Expo 2010 Shanghai China. ^{[1] [4]}

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