During the postwar era of urban renewal, Sullivan's works fell into disfavor, and many were demolished. In the 1970s growing public concern for these buildings finally resulted in many being saved. The most vocal voice was Richard Nickel, who organized protests against the demolition of architecturally-significant buildings. Nickel and others sometimes rescued decorative elements from condemned buildings, sneaking in during demolition. This practice led to Nickel's death inside Sullivan's Stock Exchange building, when a floor above him collapsed. Nickel had compiled extensive research on Adler and Sullivan and their many architectural commissions, which he intended to publish in book form. Nickel's death led to the creation in 1972 of the Richard Nickel Committee, which arranged the completion of Nickel's book and its publication in 2010. The book features all 256 commissions of Adler and Sullivan. The extensive archive of photographs and research that underpinned the book was donated to the Ryerson and Burnham Libraries at The Art Institute of Chicago. More than 1,300 photographs may be viewed on their website and more than 15,000 photographs are part of the collection at The Art Institute of Chicago. As finally published, the book, The Complete Architecture of Adler & Sullivan, was authored by Richard Nickel, Aaron Siskind, John Vinci, and Ward Miller.