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The Pentagon

File:The_Pentagon,_Headquarters_of_the_US_Department_of_Defense_(cropped2).jpg · Wikimedia Commons · See Wikimedia Commons

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The Pentagon

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Also known as Pentagon, Headquarters of the United States Department of Defense, Pentagon Office Building Complex, Headquarters of the United States Department of War (2025–present), Headquarters of the United States Department of Defense (1947–2025), Headquarters of the United States Department of War (1789–1947)

headquarters of the United States Department of Defense; named after the shape of the building, a polygon with five (greek: penta) sides

OverviewAI-generated

The Pentagon is a building that opened officially on January 15, 1943. Its inception occurred on September 11, 1941, and it entered service in 1942. The structure stands 21.6 units high and contains five floors above ground. The capital cost for the project was 83,000,000.

The building is located in the area with postal code 20301. It is referenced by 4,804 other encyclopedia articles. Official tours are available through the website pentagontours.osd.mil. The subject is categorized under "The Pentagon" and "Pentagon (building)" in Commons.

Synthesized by Vinony from 11 facts across 2 sources: Wikidata, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Wikidata facts

Named after
pentagon
Country
United States
Located in
Arlington County
Continent
North America
Body of water
Potomac River
Owned by
United States Department of Defense
Location
Arlington County
Official website
pentagontours.osd.mil/Tours
Image
The Pentagon, Headquarters of the US Department of Defense (cropped).jpg
Height
21.6
Show 18 more facts
topic's main category
Category:The Pentagon
Commons gallery
Pentagon (building)
architect
George Bergstrom
street address
1400 Defense Pentagon
date of official opening
1943-01-15
architectural style
Stripped Classicism
floors above ground
5
shape
pentagonal prism
occupant
United States Department of Defense
Commons category
The Pentagon
postal code
20301
capital cost
83000000
inception
1941-09-11
native label
The Pentagon
has facility
escalator
service entry
1942-04-00
different from
Pentagon
P12749
Hypericum tetrapterum
Sources (9)

via Wikidata · CC0

~23 min read

Encyclopedic overview

The Pentagon is the headquarters of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was constructed on an accelerated schedule during World War II. As a symbol of the U.S. military, the phrase The Pentagon is often used as a metonym for the Department of Defense and its leadership.

The building was designed by American architect George Bergstrom and built by contractor John McShain. Ground was broken on 11 September 1941, and the building was dedicated on 15 January 1943. General Brehon Somervell provided the major impetus to gain Congressional approval for the project. Colonel Leslie Groves was responsible for overseeing the project for the U.S. Army Corps of Engineers, which supervised it.

Excerpted from Wikipedia’s “The Pentagon” article, available under the CC BY-SA 4.0 licence.

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