American architect and educator, designed the Carson, Pirie, Scott and Company Building (died 1924)

Louis Sullivan

Louis Henry Sullivan was an American architect, and has been called a "father of skyscrapers" and "father of modernism". He was an influential architect of the Chicago School, a mentor to Frank Lloyd Wright, and an inspiration to the Chicago group of architects who have come to be known as the Prairie School. " The phrase "form follows function" is attributed to him; it encapsulated earlier theories of architecture and he applied them to the modern age of the skyscraper. In 1944, Sullivan was the second architect to posthumously receive the AIA Gold Medal.