Trade catalogs are a primary source of information on building materials, decorative elements and industry trends during the 19th and early 20th centuries. To find them in the Penn Libraries collections, search for the type of building material or element (i.e. cement or window glass) and the word "catalogs" at find.library.upenn.edu.
Avery Library Architectural Trade Catalogs A digitized fraction of Avery's large collection of trade literature. To search the entire collection, search CLIO, Columbia's online catalog.
Building Technology Heritage Library A collection of American and Canadian pre-1964 architectural trade catalogs, house plan books and technical building guides.
Library of Congress Trade Catalogs The collection focuses on design, decorative arts, and industries related to the field and study of decorative arts.