Sullivan is considered the father of modern American architecture. After working for several Chicago firms, he joined the office of Dankmar Adler in 1879, becoming Adler’s partner at age 24. Their 14-year association produced more than 100 buildings, many of them landmarks. During this period, Frank Lloyd Wright spent six years as an apprentice to Sullivan, who would be a major influence on the younger architect. What famous phrase did Sullivan coin to express his architectural philosophy? Discuss