William Pether art links 

Art Institute of Chicago   NEW!

Metropolitan Museum of Art Timetable of Art History  

Royal Academy of Arts Collection, London, UK

The Royal Collection, London, UK
(Zoomable - look for the magnifying glass and the text "Magnify image")

Christchurch Art Gallery / Te Puna O Waiwhetu, New Zealand   NEW!

Cleveland Museum of Art, Ohio

Harvard University Art Museums, Massachusetts   NEW!

Indianapolis Museum of Art, Indiana

William Pether at the The British Museum, London, UK

The Huntington Library, California

 

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

 

Grove Dictionary of Art Online (excerpt)  

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