Libraries
Art Libraries Netherlands
Rijksmuseum Amsterdam
Overleg Kunsthistorische Bibliotheken Nederland (OKBN)
Art Libraries other contries
Overleg Kunstbibliotheken Vlaanderen (OKBV)
National Art Library (V & A Museum), London
Courtauld Institute of Art, London
Corcoran College of Art + Design, Washington
Arlis (a.o. British and Irish libraries)
INHA, Paris
IRIS, Florence
Kunsthistorisches Institut in Florenz (DBIS)
Bibliotheca Hertziana, Rome
Frick Library, New York
Art Libraries international
International Directory of Art Libraries
Artlibraries.net (VKK)
AKMB Auktionskataloge (auction catalogues; in German)
ARTicles online
General Libraries
National Library, The Hague
Royal Library, Brussels
Library of Congress, Washington
British Library, London
Bibliothèque Nationale, Paris
Other booksites
STCN (Dutch retrospective bibliography for the period 1540-1800)
STCV (Dutch-language materials printed in Flanders between 1601 and 1700)
The European Library (searches 23 of the 47 European National Libraries)
Google Books (fulltext books online)
Search Engine University of Karlsruhe (searches major libraries worldwide)