Louis Sullivan

The Auditorium Building in Chicago, Illinois, is one of the best-known designs of Dankmar Adler and Louis Sullivan. Completed in 1889, the building is located on South Michigan Avenue, at the northwest corner of Michigan Avenue and Congress Parkway. It was declared a National Historic Landmark in 1975. It was designated a Chicago Landmark on September 15, 1976. In addition, it is a historic district contributing property for the Chicago Landmark Historic Michigan Boulevard District.

The Bayard-Condict Building, originally known simply as the Bayard Building, is the only work of architect Louis Sullivan in New York City. The building is located at 65 Bleecker Street, in the NoHo neighbourhood of New York City and built in association with architect Lyndon P. Smith between 1897 and 1899 in the Chicago School style. This commercial office building is clad in white terra cotta over a masonry wall.

The Wainwright Building is a 10-story red-brick landmark office building at 709 Chestnut Street in downtown St. Louis, Missouri. Built in 1890-91 and designed by Dankmar Adler and Louis Sullivan, it was among the first skyscrapers in the world. It was named for local financier Ellis Wainwright. It is described as "a highly influential prototype of the modern office building" by the National Register of Historic Places.