Louis Sullivan spent his childhood on his grandparents' farm where he developed a fascination with nature and buildings. After high school, he studied at MIT and began working at the firm of Adler & Sullivan. Some of their most notable designs included the Auditorium Building in Chicago and the Wainwright Building. Sullivan pioneered skyscraper design with his use of repeating window patterns and emphasis on the building's structure in its appearance. He is considered the founder of the Chicago School style and an early pioneer of Modern architecture.