ibiblio
Ibiblio: Web Museum: Giovanni Antonio Canal (Canaletto)
This ibiblio.org Web Museum site provides information about the life and artwork of Venetian painter, Giovanni Antonio Canal (1697-1768 CE). Contains mostly biographical info, with one example of his artwork, and a brief description.
Art Cyclopedia
Artcyclopedia: Western Artists
An in-depth resource about art movements and the artists involved in them. This particular page tackles artists of the American West. There is a chronological list of artists, with links to famous works and biographies.
National Gallery of Art
National Gallery of Art: George Romney
Information about portrait artist George Romney. There is a biography, and different examples of his art from 1770-1790. These are high-quality images, with details available.
National Museums Liverpool
Walker Art Gallery: George Romney
An intriguing site on the life and works of British artist George Romney. There are links to further biographies of important people in his life, including Emma Hart, Sir William Hamilton, and Lord Nelson, and how their lives intermingled.
Other
Heroines of the American Revolution: America's Founding
This is only a nugget, but what an interesting one it is! Not only was Patience a sculptress, but she was a political figure, too.