Had it been built , it would have been the tallest building in the world by far , being more than four times the height of the then tallest building in the world , the Empire State Building , and it would be nearly twice as tall as the world 's current tallest building , the Burj Khalifa , the design of which is said to have been inspired by that of The Illinois .
Had it been built , it would have been the tallest building in the world by far , being more than four times the height of the then tallest building in the world , the Empire State Building , and it would be nearly twice as tall as the world 's current tallest building , the Burj Khalifa .