The Carson Pirie Scott & Co. Store Building, 1899
Image from https://www.harboearch.com/getProject.php?projname=sullivancenterc
Louis Henry Sullivan (September 3, 1856 – April 14, 1924) was an American architect of the Chicago School. He was the creator of a new type of building: the skyscraper.
The Sullivan Center, formerly known as the Carson Pirie Scott & Co. Store Building designed by Sullivan, is perhaps one of the most recognized and significant historic buildings in Chicago.
The picture above shows a detail of the historic cast iron façades.