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• The Empire State Building is a skyscraper in Manhattan, New York City, USA.

• The building has 103 floors and at roof height is 1250 ft (381 m) tall. The height when including the antenna spire is 1454 ft (443.2 m).

• The Empire State Building was designed by William Lamb of the architect firm Shreve, Lamb & Harmon Associates.

• The contracting construction firm was Starrett Brothers and Eken.

• Around 3,400 workers were involved in the construction of the Empire State Building, with official records showing five workers died.

• It took just 410 days for the Empire State Building to be constructed, quicker than anticipated.

• The building was officially opened on May 1, 1931 when President Herbert Hoover turned the lights on with a push of a button from Washington, D.C.

• For 41 years between 1931 and 1972 the Empire State Building was the tallest building in the world.

• There are 6,514 windows in the Empire State Building.

• From street level to the 103rd floor there are 1,872 steps. A race up the stairs to the 86th floor is held annually, the athletes must climb a total of 1,576 steps.

• There are 73 elevators in the building, including 6 freight elevators.

• Because so many businesses are housed in the building the Empire State has its own zip code, 10118.

• The building itself cost $24,718,000 to build, when the cost of the land is included this figure climbs to $40,948,900. This cost was less than half of the total anticipated cost due to the Great Depression.

• The Empire State Building has a lightning rod near the top which is struck by lightning around 23 times every year.

• There are observation decks on the 86th and 102nd floors. These tourist attractions are visited by around 4 million people annually.

• The Empire State Building became the tallest building in New York City again after the collapse of the World Trade Center in 2001. In April 2012 the new One World Trade Center surpassed the Empire State Building in height.