Astronauts Harrison Schmitt (left) and Eugene Andrew Cernan practice taking geological samples at the Kennedy Space Center in Florida, in preparation for NASA's scheduled Apollo 17 lunar landing mission, on August 28, 1972. Schmitt is the Lunar Module Pilot and Cernan is the mission's Commander. They are training for their period of EVA (extravehicular activity) on the Moon. (Photo by Space Frontiers/Getty Images)

A reveller tries to hold on to a wild horse during the “Rapa Das Bestas” traditional event in the Spanish northwestern village of Sabucedo July 5, 2014. On the first weekend of the month of July, hundreds of wild horses are rounded up, trimmed and groomed in different villages in the Spanish northwestern region of Galicia. (Photo by Miguel Vidal/Reuters)

These images, scanned from old glass negatives which had surfaced in northern France, were believed to have been taken by a local amateur photographer in 1916. They showed British and a few Australian soldiers, in formal or informal poses, during or just before the most murderous battle in the history of the British Empire – Battle of the Somme. Who are these British and British Empire soldiers? The identity of the soldiers is, and may always remain, a mystery... (Property of Bernard Gardin/Dominique Zanardi/Joel Scribe/The Independent Magazine)

A teenage girl from the Santa Marta favela slum puts on a pair of high heels for a group debutante ball organized by the Pacifying Police Unit from her neighborhood in Rio de Janeiro, Brazil, Friday, August 29, 2014. The ball, which relied on volunteers who coiffed and made up the girls and a formal wear shop that loaned the dresses, helped build goodwill between pacified favelas' residents and the officers who patrol them. (Photo by Silvia Izquierdo/AP Photo via The Palm Beach Post)

Sergeant Andrew Garrett watches K-Dog, a bottlenose dolphin attached to Commander Task Unit 55.4.3, leap out of the water while training near the USS Gunston Hall March 18, 2003 in the Persian Gulf. (Photo by U.S. Navy/Getty Images)

Architectural photographer Victor Enrich has shared with ArchDaily a series of 88 images — one for every key in the classical piano — exploring the various formal possibilities of the NH Deutscher Kaiser Hotel in Munich, Germany. “I found it beautiful,” says Enrich, “to connect two distinct artistic disciplines such as photography and computer graphics with the piano.” See further illustrations and read a full description of his thought process following the break.

Colombian-Spanish actress Juana Acosta attends the Fotogramas Awards 2012 at Joy Eslava Club on March 12, 2012 in Madrid, Spain. (Photo by Carlos Alvarez/Getty Images)

Spanish matador Juan Jose Padilla looks at a bull during a bullfight at The Maestranza bullring in the Andalusian capital of Seville, southern Spain April 25, 2015. (Photo by Marcelo del Pozo/Reuters)