Keystone or key-stone may refer to: *

Keystone (architecture) A keystone (or capstone) is the wedge-shaped stone at the apex (geometry), apex of a masonry arch or typically round-shaped one at the apex of a Vault (architecture), vault. In both cases it is the final piece placed during construction and l ...

, a central stone or other piece at the apex of an arch or vault *

Keystone (cask) A keystone is a small wooden or plastic fitting used in cask ale, ale Barrel (storage), casks. For some years wooden casks have been effectively obsolete, with the majority now being aluminium or stainless steel, and a few sturdy plastic ones begin ...

, a fitting used in ale casks

Companies

* Keystone Law, a full-service law firm * Digital Keystone, a developer of digital entertainment software *

Keystone Aircraft Keystone Aircraft Corporation was an early American airplane manufacturer. History Headquartered in Bristol, Pennsylvania, the company was formed as "Ogdensburg Aeroway Corp" in 1920 by Thomas Huff and Elliot Daland, but its name was quickly c ...

Corporation * Keystone Bridge Company, an American bridge building company *

Keystone (beer brand) Keystone beer is a product of the Molson Coors Beverage Company in Golden, Colorado. It was first introduced in Chico, California in September 1989. Keystone Ice can be found in canned, kegged, and occasionally, bottled form, with 5.9% ABV. Keyst ...

Keystone Camera Company The Keystone Camera Company was an American manufacturer of consumer photographic equipment that began in 1919 in Boston. Notable products were Movie cameras, 126 film, 126 and 110 film, 110 cameras with built-in electronic flash (the "Everflas ...

* Keystone (gasoline automobile) * Keystone (steam automobile) *

Keystone Pipeline The Keystone Pipeline System is an Pipeline transport, oil pipeline system in Canada and the United States, commissioned in 2010, formerly owned by TC Energy. It is now owned by South Bow, following TC Energy's spin off of its liquids business i ...

, a crude oil pipeline * Keystone-SDA/Keystone-ATS, a Swiss press agency * Keystone View Company, a US photo agency * Keystone (Berkeley, California), a defunct music club

Education

* Keystone Academy, a private K–12 school in Shunyi, Beijing, China * Keystone College, a private college in Pennsylvania, United States * Keystone Exam, a standardized test at public schools in Pennsylvania, United States *

Keystone School Keystone School is a co-educational private school for students from pre-kindergarten to twelfth grade, located in midtown San Antonio, Texas, United States.Keystone School Online, a private for-profit online K–12 school based in Herndon, Virginia, United States * Keystone, an education program at the U.S.

National Defense University National Defence (or Defense) University (or College) may refer to: :''Alphabetical by country'' University * Marshal Fahim National Defense University, Afghanistan * National Defense University (Azerbaijan) * People's Liberation Army National Defe ...

Entertainment

* ''Keystone'' (video game), part of the Xbox Live Arcade title ''Fable 2 Pub Games'' *

Keystone (band) Keystone or key-stone may refer to: * Keystone (architecture), a central stone or other piece at the apex of an arch or vault * Keystone (cask), a fitting used in ale casks Companies * Keystone Law, a full-service law firm * Digital Keystone, a ...

, led by jazz trumpeter Dave Douglas ** ''Keystone'' (album), a 2005 album by the band *

Keystone Cops The Keystone Cops (often spelled "Keystone Kops") are fictional, humorously incompetent policemen featured in silent film slapstick comedies produced by Mack Sennett for his Keystone Film Company between 1912 and 1917. History Hank Mann creat ...

, a silent movie series * ''

Keystone Kapers ''Keystone Kapers'' is a platform game developed by Garry Kitchen for the Atari 2600 and published by Activision in 1983. The game involves a Keystone Cops theme, with the player controlling police officer Kelly, who traverses the many levels o ...

'', a classic Atari game *

Keystone Studios Keystone Studios was an early film studio founded in Edendale, California (which is now a part of Echo Park) on July 4, 1912 as the Keystone Pictures Studio by Mack Sennett with backing from actor-writer Adam Kessel (1866–1946) and Char ...

, a movie studio

Places

* The Keystone asterism in the Hercules constellation

United States

* The "Keystone State", nickname for the U.S. Commonwealth of

Pennsylvania Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...

Keystone, Colorado Keystone is a home rule town located in Summit County, Colorado, United States. The town is a part of the Breckenridge, CO Micropolitan Statistical Area. Keystone residents voted to incorporate on March 28, 2023, becoming a municipality on Feb ...

, a town **

Keystone Resort Keystone Resort is a ski resort located in Keystone, Colorado, United States. Since 1997, the resort has been owned and operated by Vail Resorts. It consists of three mountains (Dercum Mountain, North Peak, and the Outback) and five Bowls (I ...

, the related ski resort *

Keystone, Florida Keystone is an unincorporated census-designated place in Hillsborough County, Florida, United States. The Keystone area was first settled in the middle 1800s by the W.M. Mobley Family who migrated from Savannah, Georgia. The region has evolved ...

, an unincorporated community * Keystone, Indiana * Keystone, Iowa * Keystone, Missouri *

Keystone, Nebraska Keystone is an unincorporated community and census-designated place in central Keith County, Nebraska, United States. As of the 2010 census its population was 59. It lies along local roads near the North Platte River, northeast of the city of ...

* Keystone, North Dakota * Keystone, Ohio * Keystone, South Dakota, a town near Mount Rushmore * Keystone, Washington, an unincorporated community * Keystone, West Virginia * Keystone, Wyoming * Keystone at the Crossing, a business/shopping district in Indianapolis, Indiana ** The Fashion Mall at Keystone, located in the Keystone shopping district *

Keystone Heights, Florida Keystone Heights is a city located in southwestern Clay County, Florida, United States. It is the southwestern most city in the Jacksonville, Florida Metropolitan Statistical Area, and is the principal city and primary economic driver of the La ...

* Keystone Canyon, Alaska * Keystone Lake, a resort area near Tulsa, Oklahoma * Keystone, Wisconsin

Canada

* The "Keystone Province", a nickname for the Province of Manitoba **

Keystone Centre The Keystone Centre is a multi-purpose facility located in Brandon, Manitoba. Its main 5,102-seat arena, which is known as Westoba Place, is the home of the Brandon Wheat Kings of the Western Hockey League and the annual Royal Manitoba Winter Fair ...

, an arena and exhibition centre in Brandon, Manitoba

Fictional locations

Keystone City This page lists the locations in the DC Universe, the shared universe setting of DC Comics. Sites Arrowcave The Arrowcave is the former base of operations of the Green Arrow and Speedy. Avernus Cemetery Avernus Cemetery is a hidden burial gro ...

, home of the comic book character The Flash * Keystone City, a holographic city in the ''Star Trek: The Next Generation'' episode "

Emergence In philosophy, systems theory, science, and art, emergence occurs when a complex entity has properties or behaviors that its parts do not have on their own, and emerge only when they interact in a wider whole. Emergence plays a central rol ...

Railroads

Keystone Corridor The Keystone Corridor is a 349-mile (562 km) railroad corridor between Philadelphia and Pittsburgh, Pennsylvania, that consists of two rail lines: Amtrak and SEPTA's Philadelphia to Harrisburg Main Line, Philadelphia-to-Harrisburg main li ...

, a rail corridor from Philadelphia to Pittsburgh * ''

Keystone Service The ''Keystone Service'' is a 195 mile (314 km) regional passenger train service from Amtrak, that operates between the Harrisburg Transportation Center in Harrisburg, Pennsylvania, and 30th Street Station in Philadelphia, running along the P ...

'', a current New York-Harrisburg service ** ''Keystone'' (Amtrak train, 1979–1981), a predecessor of the current service * ''Keystone'' (Amtrak train, 1971–1972), a former New York-Pittsburgh service operated by Amtrak * ''Keystone'', a former New York-Washington service operated by the

Pennsylvania Railroad The Pennsylvania Railroad ( reporting mark PRR), legal name as the Pennsylvania Railroad Company, also known as the "Pennsy," was an American Class I railroad that was established in 1846 and headquartered in Philadelphia, Pennsylvania. At its ...

** ''Keystone'' (train), a lightweight train used for the service

Sports

* Keystone Junior Hockey League, in Manitoba * Keystone Cup, Western Canadian Junior "B" ice hockey championship * Keystone (horse), a racehorse

Other uses

* Keystone (limestone), quarried in the Florida Keys *

Keystone effect The keystone effect is the apparent distortion of an image caused by projecting it onto an angled surface. It is the distortion of the image dimensions, such as making a square look like a trapezoid, the shape of an architectural keystone, hence ...

, caused by projecting an image onto a surface at an angle, or by photography at an angle * Keystone Initiative, a medical protocol to reduce infection rates *

Keystone module A keystone module is a standardized snap-in package for mounting a variety of low-voltage electrical Jack (connector), jacks or optical connectors into a keystone wall plate, face plate, surface-mount box, or a patch panel. Keystone modules hav ...

, a type of data connector mounted in walls and patch panels * Keystone Press Awards *

Keystone species A keystone species is a species that has a disproportionately large effect on its natural environment relative to its abundance. The concept was introduced in 1969 by the zoologist Robert T. Paine. Keystone species play a critical role in main ...

, species that have a larger effect on their environment than is purely due to their abundance * Operation Keystone, during World War II * Keystone, a variety of

screwdriver A screwdriver is a tool, manual or powered, used for turning screws. Description A typical simple screwdriver has a handle and a shaft, ending in a tip the user puts into the screw head before turning the handle. This form of the screwdriver ...

blade * "Keystone", a descriptive reference to the

Book of Mormon The Book of Mormon is a religious text of the Latter Day Saint movement, first published in 1830 by Joseph Smith as ''The Book of Mormon: An Account Written by the Hand of Mormon upon Plates Taken from the Plates of Nephi''. The book is one of ...

*''The Keystone'', journal of the

Pennsylvania Railroad Technical and Historical Society Pennsylvania, officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, Maryland to its south, West V ...

*''The Keystone'', Pennsylvania news website owned by Courier Newsroom