Pentagon in Washington (USA) - headquarters of US Department of Defense
Location show on map
Washington, D.C., USA
Date of build
September 11, 1941 - the beginning of construction
January 15, 1943 - opening day
Pentagon is the largest office in the world. Its floor area is three times larger than the floor area in the Empire State Building . Capitol, on the other hand, would fit in any of the five parts of the Pentagon.
Each of the five sides of the building has 280,728 meters.
The whole complex includes: the main building, numerous parking lots, 30 miles of streets and 21 bridges.
In the building you will find such rooms as a library with 300,000 volumes, 284 rooms for rest, 17 restaurants, 6 cafeterias and 8 fast-food bars.
There are 23,000 employees at the Pentagon, with 16 car parks with a total area of 67 acres and 8,770 cars.
Up to 87,000 cables have been used for installed 87,000 km of cables. 200,000 conversations are conducted every day. Special mail supports 1,200,000 letters a month.
Despite 17.5 miles of corridors, the transition between any two rooms takes no more than seven minutes. The building has 131 stairs, 19 escalators and 13 lifts.
680,000 tons of sand and gravel were used to build the facility, 4,200,000 m² land and 332,000 m² concrete. 41 492 concrete piles were driven into the foundations.
On the five floors of the building there are 7 754 windows, 672 fire extinguishers, 16 250 lighting devices, 691 drinking fountains and 4,200 watches.
In the secretary of defense room there is the largest desk in the Pentagon, on the desk there are three telephones, white - with a direct connection to the White House, red - for talks with Russia and commando staging places, blue - to communicate with the most important people in the building.
The secretary of defense cabinet combines one elevator with an underground operating room, where reports from around the world arrive, here is the command center of the largest defense organization in the world.
Official website: http://www.defense.gov