SPIRO is the visual online public access catalog to the 35mm slide collection of the Architecture Visual Resources Library (AVRL) at the University of California at Berkeley. The collection numbers over 250,000 slides and 20,000 photographs. Web images display in thumbnail only. Copyright use without permission for student work, educational purposes, non-published works (with attribution). All other use requires permission.

http://www.mip.berkeley.edu/spiro/