Websites for Classical Painting research (Spain and Mexico)

www.ibiblio.org/wm/paint/auth/murillo/

www.abcgallery.com/M/murillo/murillo.html

www.spanisharts.com/prado/murillo.htm

www.ibiblio.org/wm/paint/auth/goya/

www.artchive.com/artchive/G/goya.html

www.metmuseum.org/toah/hd/goya/hd_goya.htm

www.artcyclopedia.com/artists/

www.mcs.csuhayward.edu/~malek/Velazquez.html

www.abcgallery.com/V/velazquez/velazquez.html

www.spanisharts.com/prado/zurbaran.htm

www.artchive.com/artchive/Z/zurbaran.html

www.wga.hu/html/z/zurbaran/index.html

http://diegorivera.com/index.php

www.artcyclopedia.com/artists/rivera_diego.html

www.abcgallery.com/R/rivera/rivera.html

www.fridakahlofans.com/mainmenu.html

www.artcyclopedia.com/artists/kahlo_frida.html

http://en.wikipedia.org (I know it is not perfect, but it is good enough for birthdates and countries of origin.)