A comprehensive index of artists represented at hundreds of museum sites, image archives, and other online resources.
This is an amazing guide to the performing arts. You can find "digitized items from the collections; special Web presentations on topics and collections; articles and biographical essays; finding aids to collections; databases for performing arts resources; information on concerts at the Library; and a special Performing Arts Resource Guide which contains entries for hundreds of Library collections, Web sites, databases and exhibits."
The Prints and Photographs Online Catalog (PPOC) contains catalog records and digital images representing a rich cross-section of still pictures held by the Prints & Photographs Division of the Library of Congress.