http://auctioncatalogs.jstor.org/

"JSTOR is collaborating with the Frick Collection and the Metropolitan Museum of Art in a pilot project funded by The Andrew W. Mellon Foundation to understand how auction catalogs can be best preserved for the long-term and made most easily accessible for scholarly use. Auction catalogs are vital for provenance research as well as for the study of art markets and the history of collecting.

This prototype site is open to the public through June 2010."

Unter den Katalogen ist auch der Versteigerungskatalog des Nachlasses von Emmanuel Leutze.