A skyscraper is a very tall building with many stories. Today some skyscrapers have more than 100 stories. The modern city, center of economic activity and capital of culture, is unimaginable without skyscrapers.
Before the middle of the 1800s the tremendous weight of each story made it impossible to build very high. Some architects used an iron frame to support taller buildings. In the 1860s steel became widely available. It is stronger and lighter than iron. Chicago’s Home Insurance Company Building was the first skyscraper to use steel construction. Built in 1884–85, it was 10 stories high.
In 1853 an American inventor Elisha Graves Otis introduced an elevator.