Chicago Landmarks: Louis Sullivan
- Photograph and biography of the architect, with a guide to his works in Chicago, from City of Chicago Department of Planning and Development.
- http://www.ci.chi.il.us/Landmarks/Architects/Sullivan.html

Louis Sullivan After Functionalism
- Michael J. Lewis examines Sullivan's place in history and the role of ornament in his work. Article from the New Criterion, with references.
- http://www.newcriterion.com/archive/20/sept01/lewis.htm

Louis Sullivan
- A portrait photograph and biography from Prairie Styles of this innovatory architect.
- http://www.prairiestyles.com/lsullivan.htm

Louis Sullivan: The Growth of an Idea
- Scholarly article with bibliography by Gerry Boudreaux, concentrating on the Chicago Auditorium and the National Farmers Bank in Owatonna, Minnesota.
- http://www.tape.net/~gerry/sullivan/sullivan.html