25.7.11

Chicago, giorno 12

Illustrazione di Hermann Rosse
Come sono nati i grattacieli.
"The immediate problem was increased daylight, the maximum of daylight. This led him to use slender piers, tending toward a masonry and iron combination, the beginning of a vertical system. This method upset all precedent..." Dall'autobiografia di Louis Sullivan, The Autobiography on an Idea. 

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