Jacob van der Ulft art links 

Fitzwilliam Museum at the University of Cambridge, UK
Italian landscape with ruined buildings, ink drawing

Louvre Museum Graphic Art Database, Paris (in French)   NEW!  

Mauritshuis Royal Picture Gallery, The Hague   NEW!
Great scans of Mauritshuis paintings, from the 'Memory of the Netherlands' project

Rijksmuseum, Amsterdam   NEW!
Great scans of Rijksmuseum paintings, from the 'Memory of the Netherlands' project

Rijksmuseum Research Database, Amsterdam (in Dutch)  
4 works by Jacob van der Ulft online

Amsterdams Historisch Museum, Amsterdam (in Dutch)   NEW!  

Courtauld Institute of Art, London, UK

Dordrechts Museum, Netherlands (in Dutch)  

Harvard University Art Museums, Massachusetts

Seattle Art Museum
Landscape

The Albertina Graphic Art Databank, Vienna (in German)   NEW!  

Victoria and Albert Museum Catalogue, London, UK
Seaport and Triumphal Arch

 

Jacob van der Ulft in the Art Renewal Center

Jacob van der Ulft in the Web Gallery of Art  

World Visit Guide (formerly Insecula)

Bildindex der Kunst und Architektur (in German)  
(a welcome screen is displayed for a couple of seconds before the search results appear)

 

Union List of Artist Names (Getty Museum)  
Reference sheet with basic information about the artist and pointers to other references.