http://www.kahlo.org/self-portrait-with-thorn-necklace-and-hummingbird/ https://www.widewalls.ch/frida-kahlo-self-portrait-with-thorn-nec...

https://www.tate.org.uk/art/artworks/warhol-liz-ar00320 https://www.christies.com/features/Andy-Warhol-and-Liz-Taylor-7348-3.aspx...

https://news.masterworksfineart.com/2018/10/01/pablo-picasso-the-old-guitarist https://www.pablopicasso.org/old-guitarist.jsp

https://www.thoughtco.com/christinas-world-by-andrew-wyeth-183007 https://www.moma.org/collection/works/78455

09/01/19 https://news.artnet.com/art-world/vermeer-girl-reading-letter-window-1539199 http://www.jan-vermeer.org/girl-reading-a-letter-at...