Keystone or key-stone or ''variation'', may refer to: *

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

, 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 ale 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 beginning to appear. Neverthele ...

, a fitting used in ale casks

Business

* Keystone Law, a full-service law firm *

Digital Keystone Digital Keystone, Inc. develops digital entertainment technologies that bridge Pay TV with the new digital home. DK solutions include security and navigation software. Digital Keystone also develops industry-standard validation tools for develo ...

, 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 ...

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 and 110 110 may refer to: *110 (number), natural number *AD 110, a year *110 BC ...

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

Keystone Pipeline The Keystone Pipeline System is an oil pipeline system in Canada and the United States, commissioned in 2010 and owned by TC Energy and as of 31 March 2020 the Government of Alberta. It runs from the Western Canadian Sedimentary Basin in Alber ...

, a crude oil pipeline * Keystone-SDA/Keystone-ATS, a Swiss press agency *

Keystone View Company The Keystone View Company was a major distributor of stereographic images, and was located in Meadville, Pennsylvania. From 1892 through 1963 Keystone produced and distributed both educational and comic/sentimental stereoviews, and stereoscopes. B ...

, a US photo agency * Keystone (Berkeley, California), a defunct music club

Entertainment

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

Keystone (band) Keystone or key-stone or ''variation'', 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 Business * Keystone Law, a full-service law firm * Di ...

, 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 The idea for th ...

, a silent movie series * '' Keystone Kapers'', a classic Atari game * Keystone Studios, 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 (; ( Pennsylvania Dutch: )), 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, ...

Keystone, Colorado Keystone is an unincorporated community and a census-designated place (CDP) located in and governed by Summit County, Colorado, United States. The CDP is a part of the Breckenridge, CO Micropolitan Statistical Area. The population of the Keyston ...

, 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, the Outback – and five Bowls (Ind ...

, 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 f ...

, an unincorporated community *

Keystone, Indiana Keystone is an unincorporated community in Chester Township, Wells County, in the U.S. state of Indiana. History A large share of the early settlers being natives of Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the C ...

Keystone, Iowa Keystone is a city in Benton County, Iowa, United States. The population was 599 at the time of the 2020 census. It is part of the Cedar Rapids Metropolitan Statistical Area. History Keystone was platted in 1881 when the Chicago, Milwaukee, and ...

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 is a former unincorporated community (ghost town) in Dickey County, North Dakota, United States. History Keystone was originally built up by settlers from Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Com ...

Keystone, Ohio Keystone (previously known as Keystone Station) is an unincorporated community in Bloomfield Township, Jackson County, Ohio, United States. It is located south of the city of Jackson, at the intersection of Franklin Valley Road and Keystone Stat ...

Keystone, South Dakota Keystone is a town in the Black Hills region of Pennington County, South Dakota, United States. The population was 240 at the 2020 census. It had its origins in 1883 as a mining town, and has since transformed itself into a resort town, serving ...

, a town near Mount Rushmore * Keystone, Wyoming *

Keystone at the Crossing Keystone or key-stone or ''variation'', 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 Business * Keystone Law, a full-service law firm * Dig ...

, a business/shopping district in Indianapolis, Indiana **

The Fashion Mall at Keystone The Fashion Mall at Keystone, known better as The Fashion Mall, is an upscale shopping center in the northeast section of the city of Indianapolis, Indiana. The mall is located off I-465 at 86th Street and Keystone. The mall is considered the hear ...

, located in the Keystone shopping district *

Keystone Heights, Florida Keystone Heights is a city located in southwestern Clay County, Florida, United States. The population of the city was 1,446 at the 2020 census. The city's name is derived from the state of Pennsylvania's nickname, the "Keystone State". History ...

* Keystone Canyon, Alaska *

Keystone Lake Keystone Lake is a reservoir in northeastern Oklahoma on the Arkansas and Cimarron rivers. It is located upstream about from Tulsa. It was created in 1968 when the Keystone Dam was completed. The primary purposes are: flood control, hydroelect ...

, a resort area near Tulsa, Oklahoma *

Keystone, Wisconsin Keystone is a town in Bayfield County, Wisconsin, United States. The population was 378 at the 2010 census. The unincorporated community of Ino is located in the town. Geography According to the United States Census Bureau, the town has a total a ...

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 list the locations in the DC Universe, the shared universe setting of DC Comics. Sites * the Arrowcave – The former base of operations of the Green Arrow and Speedy. * Avernus Cemetery – A burial ground located in Central City for ...

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

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, which hosts SEPTA's Paoli/Thorndale ...

, a rail corridor from Philadelphia to Pittsburgh * '' Keystone Service'', 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 ** ''Keystone'' (train), a lightweight train used for the service

Schools

Keystone School Keystone School, generally called Keystone, is a co-educational independent private school for students from pre-kindergarten to twelfth grade, located in the Monte Vista Historic District in Midtown San Antonio, Texas, USA.Keystone National High School, a private correspondence school * Keystone Exam, a Pennsylvania standardized test

Sports

Keystone Junior Hockey League The Keystone Junior Hockey League (KJHL) is a Junior 'B' ice hockey league in the province of Manitoba, Canada. The league, sanctioned by Hockey Manitoba, was formerly known as the Manitoba Junior 'B' Hockey League. History The KJHL champion us ...

, in Manitoba *

Keystone Cup The Keystone Cup is the Junior B ice hockey championship and trophy for Western Canada. From 1983 to 2017, the championship was the culmination of the champions of 12 hockey leagues in British Columbia, Alberta, Saskatchewan, Manitoba, and Northw ...

, Western Canadian Junior "B" ice hockey championship *

Keystone (horse) Keystone (also known as Keystone II, 1903 – 1929) was a British Thoroughbred racehorse and broodmare. Having suffered from ill-health as a juvenile she recorded an emphatic win in the Epsom Oaks on her second racecourse appearance. She we ...

, a racehorse

Other uses

Keystone (limestone) Keystone is a type of limestone, or coral rag, quarried in the Florida Keys, in particular from Windley Key fossil quarry, which is now a State Park of Florida. The limestone is Pleistocene in age, and the rock primarily consists of scleract ...

, 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 (archit ...

, 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 jacks or optical connectors into a keystone wall plate, face plate, surface-mount box, or a patch panel. Keystone modules have a rectangular ...

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

Keystone Press Awards The Keystone Press Awards are a prominent series of awards presented by the Pennsylvania Newspaper Association to Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the ...

* Keystone species, 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. 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 has been repla ...

blade * "Keystone", a descriptive reference to the

Book of Mormon The Book of Mormon is a religious text of the Latter Day Saint movement, which, according to Latter Day Saint theology, contains writings of ancient prophets who lived on the American continent from 600 BC to AD 421 and during an interlude d ...