The term skyscraper originally applied to buildings of 10 to 20 stories, but by the late 20th century the term was used to describe high-rise buildings of unusual height, generally greater than 40 or 50 stories.
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Buildings that ranged between 10 and 20 floors continued to be labeled as “skyscrapers” for years to come. As advances were made in construction, the qualifications to be considered a skyscraper grew to 150-meter (492-foot) minimum.
Elevator ticket sales in the Eiffel Tower regained almost the entire cost of the structure -- in just one year! Here's how this skyscraper stacks up against the biggest skyscrapers in the world. Fast Facts: The Eiffel Tower is repainted every seven years -- with 50 tons of dark brown paint.
The Home Insurance Building in Chicago is often considered the world's first skyscraper due to both its design and height; the building was supported using an iron frame skeleton.