As you might have guessed, it was in the United States. Tall buildings were called skyscrapers as early as the 1880s. They were built on a steel structure and had central heating, electrical pumps and lifts. In 1890, Major William Le Baron Jenney and Louis Sullivan built the first skyscraper in Chicago. This was the Home Insurance Building. It had ten floors, including the basement. Two floors were added in 1891. Skyscrapers could house so many people that they changed the way people lived and worked.