The phrase “form follows function” was coined by architect Louis Sullivan (1856 – 1924) in his 1896 essay “The Tall Office Building Artistically Considered.” He is considered by many as the creator of the modern skyscraper, was an influential architect and critic of the Chicago School, was 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. Sullivan is one of the recognized trinity of American architecture, along with Wright and Henry Hobson Richardson,