The Pentagon

The Pentagon is the headquarters of the U.S. Department of Defense.

Facts & figures

• Overall
• Construction began September 11, 1941
• Construction completed January 15, 1943
• Total cost of project (including outside facilities): $83,000,000
• Land
• Total land area: 583 acres (2.4 km²)
• Location: 38.870863N, -77.055917E
• Cost: $2,245,000
• Area covered by Pentagon bldg: 29 acres (117,000 m²)
• Area of center court: 5 acres (20,000 m²)
• Access highways built: 30 miles (48 km)
• Overpasses and bridges built: 21
• Parking
• Parking space: 67 acres (270,000 m²)
• Capacity (vehicles): 8,770
• Main building
• Cost of building: $49,600,000
• Gross floor area: 6,636,360 ft² (620,000 m²)
• Cubic contents: 77,015,000 ft³ (2,000,000 m³)
• Length of each outer wall: 921 ft (280 m)
• Height of building: 77 ft 3.5 in (24 m)
• Number of floors, plus mezzanine and basement: 5
• Total length of corridors: 17.5 mile (28 km)
• Number of:
• Stairways: 131
• Escalators: 19
• Elevators: 13
• Rest rooms: 284 (Twice as many as necessary, due to the Pentagon being designed for twice the number of employees it holds today)
• Fixtures: 4,900
• Drinking fountains: 691 (See "Rest rooms" above)
• Clocks installed: 4,200
• Light fixtures: 16,250
• Windows: 7,754