America's Favorite Architecture: "Top 150 architecture projects selected by the American public."
Architecturefarm : "Architecture and the ivory tower in the great Midwest."
Arts of the United States. Includes architecture. Photography of the buildings was executed in the mid 20th century.
Blueprint: Chicago. Essays on Chicago architecture.
Calisphere: Images relating to California from California institutions.
Calisphere: Images specifically from the Panama Pacific International Exposition of 1915.
Chicago Architecture Info: Guide to information about historical and current architecture in the city.
Chicago History Museum: Architecture and Building History resources.
Chicago Landmarks. "The City of Chicago's Official Site."
Cinema Treasures: "Your guide to movie theaters."
DesignInform: Internet sources for biographical information on architects and other people in the arts.
Documenting Modern Living: Digitizing the Miller House and Garden Collection. Ongoing digitization project concerning materials relating to Eero Saarinen designed house in Columbus, Indiana.
Eames Designs: A Virtual Encyclopedia of All Things Eames.
Edgar A. Tafel Archive at the Avery Architectural & Fine Arts Library: Blog about the processing of the collection.
Everything I Know: "42 Hours of Buckminster Fuller's Visionary Lectures Free Online (1975)."
Fort Moultrie May 1860: 3-D digital recreation of the remnants of the 200-year-old Fort Moultrie in Charleston Harbor, South Carolina. Includes pages on history, architecture, and weaponry of the fort, a glossary, videos, and digitized photos and prints.
Gottscho-Schleisner Collection: Architecture and Interior Design for 20th Century America. Library of Congress American Memory Project.
Historic Detroit.org : An excellent resource for buildings in Detroit, both extant and demolished.
Historic Preservation Libguide at the University of Pittsburgh. Although created for students at Pittsburgh, the list of resources is still helpful to anyone researching in this field.
Pacific Coast Architecture Database. Contains basic information about individual buildings on the West Coast.
Providence Architecture: site created by students for a class at Brown University.
Research Materials for Architecture and the Built Environment Located in Metropolitan Washington, D.C.
Ryerson & Burnham Archive at Art Institute of Chicago. Collections strong in 19th and 20th century American architecture.
Ryerson & Burnham Archives: Archival Image Collection. Digital images from all the collections, including important Chicago architects' papers and drawings, World's Fairs material, and artist's papers.
Special Collections Research Center at Syracuse University: Architecture and Industrial Design. Includes papers of Pietro Belluschi, Marcel Breuer, William Lescaze, Richard J. Neutra, Werner Seligmann, Dwight James Baum, Russel Wright, William Dorwin Teague, The Industrial Designers Society of America Records and more.
University of Virginia Visual History Collection ca. 1825 to present. From the Digital Public Library of America.
World's Columbian Exposition, Chicago, 1893: The Architects and their Buildings.