The theme of the Marlon Gobel collection is the "cowboys of the sky", the ironworkers of the 20s where this type of work brought brave young men from Europe and Canada to New York, the capital of skyscrapers, to "build this city". Documented by photographer Lewis Hine in his series "men at work" he showcases men laboring on iron beams up in the air, for the construction of the Empire State building in 1930.