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- Noun

The central or topmost stone of an arch. This in some styles is made different in size from the other voussoirs, or projects, or is decorated with carving. See Illust. of Arch.

More related articles

  • Keystone

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

  • Keystone Studios

    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 Charles O. Baumann (1874–1931), owners of the New York Motion Picture Company (founded 1909). The company, referred to at its office as The Keystone Film Co., filmed in and around Glendale and Silver Lake, Los Angeles for several years, and its films were distributed by the Mutual Film Corporation between 1912 and 1915.

  • Keystone Oaks School District

    Keystone Oaks School District

    Keystone Oaks School District is a small, public school district in suburban Pittsburgh, Pennsylvania. The district consists of 3 non-contiguous communities and encompasses approximately 5 square miles (13 km2). It was formed in 1965 after the merger of three smaller districts serving Dormont, Castle Shannon, and Green Tree. According to 2000 federal census data, Keystone Oaks School District serves a resident population of 22,580 people. According to District officials, in school year 2007-08 the KOSD provided basic educational services to 2,295 pupils. It employed 188 teachers, 98 full-time and part-time support personnel, and 13 administrators. Keystone Oaks School District received more than $8.3 million in state funding in school year 2007-08.

  • Keystone, South Dakota

    Keystone, South Dakota

    Keystone is a town in the Black Hills region of Pennington County, South Dakota, United States. The population was 337 at the 2010 census. It had its origins in 1883 as a mining town, and has since transformed itself into a resort town, serving the needs of the millions of visitors to the Mount Rushmore National Memorial, which is located just beyond city limits. Keystone was heavily damaged in the 1972 Black Hills flood.

  • Keystone, Colorado

    Keystone, Colorado

    Keystone is a census-designated place (CDP) in Summit County, Colorado, United States. The population was 1,079 at the 2010 census. The Dillon Post Office (ZIP Code 80435) serves Keystone postal addresses.

  • 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 scleractinian coral, such as Elkhorn coral and Brain coral.

  • Keystone City

    Keystone City is a fictional city in the DC Comics Universe. Specifically, it is the home of both the original Flash, Jay Garrick, and the third Flash, Wally West. Keystone City first appeared in the 1940s in the original Flash Comics series. It is also the home of Dr. Mid-Nite (Dr. McNider)

  • Keystone Patrician

    Keystone Patrician

    The Keystone K-78 Patrician was an airliner developed in the United States in the late 1920s, built only in prototype form.

  • Keystone Building (Aurora, Illinois)

    Keystone Building (Aurora, Illinois)

    The Keystone Building in Aurora, Illinois is a building from 1922. It was listed on the National Register of Historic Places in 1980. The structure is one of two buildings on Stolp Island designed by George Grant Elmslie, the other one being the Graham Building. In addition, there are three other buildings within Aurora that share the same architect, (the Old Second National Bank, the Healy Chapel, and the German-American Bank ) making Aurora, Illinois the biggest collection of Elmslie's commercial buildings.

  • Lady Keystone Open

    The Lady Keystone Open was a golf tournament on the LPGA Tour from 1975 to 1994. In its first year it was a satellite tour event but became a full event in 1976. It was played at three different courses in southcentral Pennsylvania but mainly at the Hershey Country Club in Hershey, Pennsylvania.

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