Details

Keywords Change this

Colossus

Project timeline

September 11th 1941 – January 15th 1943

Type

Office

Location Change this

Washington, D.C.
USA

Architect Change this

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Article last edited by Bostjan on
January 19th, 2018

The Pentagon Change this

Washington, D.C., USA
by George Bergstrom Change this

The Pentagon in April 2002.

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Description Change this

The Pentagon is the headquarters of the United States Department of Defense, located in Arlington County, Virginia, across the Potomac River from Washington, D.C. As a symbol of the U.S. military, The Pentagon is often used metonymically to refer to the U.S. Department of Defense. The Pentagon was designed by George Bergstrom (1876–1955), and built by general contractor John McShain of Philadelphia. Ground was broken for construction on September 11, 1941, and the building was dedicated on January 15, 1943.

The Pentagon is one of the world's largest office buildings, with about 600,000 m2, of which 340,000 m2 are used as offices. Approximately 23,000 military and civilian employees and about 3,000 non-defense support personnel work in the Pentagon. It has five sides, five floors above ground, two basement levels, and five ring corridors per floor with a total of 28.2 km of corridors. The Pentagon includes a five-acre (20,000 m2) central plaza, which is shaped like a pentagon and informally known as "ground zero," a nickname originating during the Cold War on the presumption that it would be targeted by the Soviet Union at the outbreak of nuclear war.

On September 11, 2001, exactly 60 years after the building's construction began, American Airlines Flight 77 was hijacked and flown into the western side of the building, killing 189 people (59 victims and the five perpetrators on board the airliner, as well as 125 victims in the building), according to the official report. It was the first significant foreign attack on Washington's governmental facilities since the city was burned by the British during the War of 1812.

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