The Art & Architecture Collection is arranged in Library of Congress call number order, and can be found in the northwest corner of the second floor. Relevant call number ranges include:
Not sure where to find the book you need? Check out the map of the Art & Architecture Collection.
CU Boulder Library Catalog
Use the following tools to get books from other libraries:
Request books from Colorado libraries that will come in just a few days. Use to request books Boulder doesn't have, or that are checked out.
These catalogs search the holdings of major art libraries around the world. Best when its useful to limit the scope of your search to just items related to art history.