The Guaranty Building, which opened in 1896, is recognized as one of Sullivan’s and is an outstanding example of his innovations.
In the 1890s, the steel skeleton skyscraper was a new and uniquely American building type. Most early skyscrapers borrowed heavily from more traditional European design and used strong horizontal lines to de-emphasize their verticality. Sullivan wanted a bold architectural style for the new building type that would express the confidence and prosperity of the United States at the end of the 19th century. He rejected traditional designs and celebrated the skyscraper’s verticality.