The invention of passenger elevators was the greatest factor in the development of skyscrapers (very tall commercial buildings).<em> The first skyscraper was the Home Insurance Building (originally made of 10 stories) in Chicago, and designed by William Le Baron Jenney.</em> Skyscrapers became more frequent and each time taller because they allowed to create more stories (floors) and to make the most out of a limited space, mainly <em>because passenger elevators made possible to translate from floor to floor without using the stairs. </em>
