The project involved 3,400 workers, mostly immigrants from Europe, along with hundreds of Mohawk iron workers. The construction was part of an intense competition in New York for the title of "world's tallest building". The Empire State Building remained the tallest man-made structure in the world for 23 ...years before it was surpassed by the Griffin Television Tower Oklahoma in 1954. It was also the tallest free-standing structure in the world for 36 years before it was surpassed by the Ostankino Tower in 1967.
The longest world record held by the Empire State Building was for the tallest skyscraper (to structural height), which it held for 42 years until it was surpassed by the North Tower of the World Trade Center in 1972.