Ten keyboard instruments: Grand piano, Upright piano, Harpsichord, Clavichord, Spinet, Virginal, Pipe organ, Harmonium, Celesta, Digital piano. A short introduction to their cases, keyboards and visible details using real photographs. Historical instruments are represented by museum examples; the pipe organ is shown by its front in Laon Cathedral, without a view of the keyboard. A thematic selection, not a ranking of quality or popularity. Photographs from Wikimedia Commons and museum collections. Credits and modifications: File:Grand Piano MET DP300941.jpg: The Metropolitan Museum of Art; instrument maker in catalogue: Bartolomeo Cristofori; CC0; http://creativecommons.org/publicdomain/zero/1.0/deed.en; https://commons.wikimedia.org/wiki/File:Grand_Piano_MET_DP300941.jpg; Scaled and letterboxed without cropping. File:Steinway & Sons upright piano, model 1098, manufactured at Steinway's factory in New York City.jpg: Steinway & Sons, 1 Steinway Place, Long Island City, New York 11105, The United States, www.steinway.com . Steinway & Sons, 10 Rondenbarg, Hamburg D-22525, Germany, eu.steinway.com .; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Steinway_%26_Sons_upright_piano,_model_1098,_manufactured_at_Steinway%27s_factory_in_New_York_City.jpg; Scaled and letterboxed without cropping. File:Harpsichord, Alessandro Trasuntino, Venice, 1531.jpg: Royal College of Music; CC BY 4.0; https://creativecommons.org/licenses/by/4.0; https://commons.wikimedia.org/wiki/File:Harpsichord,_Alessandro_Trasuntino,_Venice,_1531.jpg; Scaled and letterboxed without cropping. File:Clavichord MET DP302629.jpg: The Metropolitan Museum of Art; instrument maker in catalogue: Christian Kintzing; CC0; http://creativecommons.org/publicdomain/zero/1.0/deed.en; https://commons.wikimedia.org/wiki/File:Clavichord_MET_DP302629.jpg; Scaled and letterboxed without cropping. File:Bentside spinet MET DT306741.jpg: The Metropolitan Museum of Art; instrument maker in catalogue: John Harris; CC0; http://creativecommons.org/publicdomain/zero/1.0/deed.en; https://commons.wikimedia.org/wiki/File:Bentside_spinet_MET_DT306741.jpg; Scaled and letterboxed without cropping. File:Gabriel Townsend, London, 1641 - virginal - IMG 3908.JPG: Daderot; Public domain; Public domain; https://commons.wikimedia.org/wiki/File:Gabriel_Townsend,_London,_1641_-_virginal_-_IMG_3908.JPG; Scaled and letterboxed without cropping. File:Laon Cathedral Organ 01.JPG: Uoaei1; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Laon_Cathedral_Organ_01.JPG; Scaled and letterboxed without cropping. File:John Church and Co. reed organ.jpg: Boygold; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:John_Church_and_Co._reed_organ.jpg; Scaled and letterboxed without cropping. File:Celesta Schiedmayer Studio.jpg: Schiedmayer Celesta GmbH; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Celesta_Schiedmayer_Studio.jpg; Scaled and letterboxed without cropping. File:Yamaha P-150 20050712.jpg: Pingel at Dutch Wikipedia; CC BY-SA 3.0; http://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File:Yamaha_P-150_20050712.jpg; Scaled and letterboxed without cropping. Adapted visuals and original contributions to this version are offered under CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/. Source photographs retain their stated licenses; no ownership of the originals is claimed.