Serving as the headquarters for the United States Department of Defence, The Pentagon, is the largest office building in the world, with more than six million total square feet of space, including corridors that stretch 17.5 miles.Completed in 1943, The Pentagon has been the logistical hub for all U.S.Military operations for more than five decades.This pentagon-shaped coin commemorates The Pentagon's central role in protecting the American people and defending America's interests throughout the world.The obverse features a rendering of the Pentagon set below the seals of Navy, Army, Marines, and Air Force, all set against a translucent blue enamel.The reverse depicts the seal of the Department of Defence in full colour.Minted in a brass alloy and coated with an antique finish, this coin is imbued with richly coloured enamel accents on both sides.Each coin comes packaged with a header card that describes the Pentagon in full detail.