The Pentagon through time

Posted: 10:50 AM EDT Aug 24, 2011   Updated: 2:27 PM EDT Sep 10, 2013
The Pentagon through time

Finished in 1943, the Pentagon is a symbol of U.S. military might. It's also one of the places attacked on 9/11.

Pentagon Slideshow: Pentagon Around 1950
1 / 9
Theodor Horydczak Collection/Library of Congress

Construction on the Pentagon started on Sept. 11, 1941, in the midst of World War II. The five-sided design was chosen to accommodate existing roads around the building's original site near Arlington National Cemetery; a different site was ultimately picked, but the design was kept, according to the History Channel.


Most Viewed on


Slideshow Of The Day

  • Royal Baby departing Lindo Wing

    Chris Jackson/Getty Images

    Royals welcome Charlotte Elizabeth Diana

    The Duke and Duchess of Cambridge have named the royal baby Charlotte Elizabeth Diana, according to a statement released by Kensington Palace,

On this Day

  • Operation Buster-Jangle, Uncle atom bomb test

    National Nuclear Security Administration

    On this day: November 29

    Edison shows off his phonograph, atom bomb testing heads underground, a chimpanzee orbits the Earth, the Pong craze begins, and the world loses another Beatle, all on this day.