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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 Service

    Keystone Service

    Amtrak's 195-mile (314 km) Keystone Service provides frequent regional passenger train service between the Harrisburg Transportation Center in Harrisburg, Pennsylvania and 30th Street Station in Philadelphia, running along the Philadelphia to Harrisburg Main Line. Most trains continue along the Northeast Corridor (NEC) to Pennsylvania Station in New York.

  • Keystone Law

    Keystone Law

    Keystone Law (formerly Lawyers Direct; operating in Australia as Keypoint Law) is a national law firm headquartered in London, United Kingdom, with offices in several other countries, which offers legal services for business and individuals. The firm was established in 2002, operating under a business model wherein lawyers use a technology platform provided to work flexibly, rather than necessarily working in a physical office space maintained by the firm. In 2017, it became the third firm in the UK to be listed on the London Stock Exchange (KEYS).

  • Keystone (Berkeley, California)

    The Keystone, also known as Keystone Berkeley, was a small music club at 2119 University Avenue in Berkeley, California, which operated in the 1970s and 1980s. Numerous nationally known groups performed there, and the club was a regular venue for the Jerry Garcia Band. Keystone Berkeley, run by Freddie Herrera and Bobby Corona, was linked to The Stone and Keystone Palo Alto.

  • Keystone Markers

    Keystone Markers

    A system of roadside signage developed by the Pennsylvania Department of Highways just after the First World War, the iconic Keystone Markers could be found at the entrance to every Pennsylvania town, borough and city. Variations of the marker could be found at highway crossings of creeks, rivers, trails, borough lines, and other points of interest.

  • 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 Science

    Keystone Science (born February 7, 1999) is a YouTube star.

  • 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 Lake

    Keystone Lake

    Keystone Lake is a reservoir in northeastern Oklahoma on the Arkansas and Cimarron rivers. It is located upstream about 23 miles (37 km) from Tulsa. It was created in 1968 when the Keystone Dam was completed. The primary purposes are: flood control, hydroelectric power generation, wildlife management and recreation.

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