Life Magazine has a photo gallery titled “Building The Pentagon: Rare Photos” showing rare photos of the iconic, colossal edifice under construction in 1941 and 1942. The Pentagon is the world’s largest office building and home of the Department of Defense. Some interesting tidbits from the article include:
Despite having 3,705,793 square feet for offices, concessions, and storage and a gross floor area of 6,636,360 square feet, the Pentagon is designed so that, ideally, it takes at most seven minutes to walk between any two points in the building.
Five-and-a-half million cubic yards of earth and 41,492 concrete piles were necessary for the foundation of the building, as well as 680,000 tons of sand and gravel from Potomac that were processed into 435,000 cubic yards of concrete.