Other
National Portrait Gallery: Collections: Sitters a Z
This site from the official National Portrait Gallery of the United Kingdom is a resource to search the collection by typing in a subject's name or access the section on artists.
National Library of France
National Library of France: Portraits/faces
A virtual exhibit presenting a variety of nineteenth- and twentieth-century portraits. As you browse through the pages, click on each portrait to see larger version and related information (date, artist, dimensions, etc.). Images are...
Art Cyclopedia
Artcyclopedia: Chronological Listing of Portrait Artists
ArtCyclopedia's complete list of portrait artists from the 15th century to today. There are links to the artists' biography and works.