Louis Henry Sullivan Later career and declined

https://en.wikipedia.org/wiki/Louis_Sullivan

Louis Henry Sullivan (September 3, 1856 – April 14, 1924)[1] was an American architect, and has been called the "father of skyscrapers"[2] and "father of modernism".[3] He is considered bymany 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. Along with Wright and Henry Hobson Richardson, Sullivan is one of "the recognized trinity of American architecture".[4] "Form follows function" is attributed to him although he credited the origin of the concept to an ancient Roman architect.