 The art case pianos are unique, because Steinway builds only one of each.Some of Steinway's most notable art case pianos are the "Alma-Tadema grand piano" from 1887, the 100,000th Steinway piano from 1903, the 300,000th Steinway piano from 1938, and the "Sound of Harmony" from 2008.The "Alma-Tadema grand piano" was designed by Sir Lawrence Alma-Tadema and received great public acclaim when it was exhibited in London.