Louis Sullivanwas one of the most important architects working at the turn of the 20th century. His most well-known work was done in Chicago as part of the firm of Adler and Sullivan, but he also designed well-regarded buildings in cities like Philadelphia, St. Louis, and Buffalo. He has been called both the “father of the skyscraper” and the “father of modernism,” as well as being the progenitor of the...