Here's Frida Kahlo's self-portrait that she dedicated to Trotsky: <http://www.artchive.com/artchive/K/kahlo/kahlo_trotsky.jpg.html>.
You can see Trotsky in Diego Rivera's "Man, Controller of the Universe" mural at <http://www.fbuch.com/controll.htm>.
Yoshie
PS. I'm posting from an internet cafe in Chigasaki, Kanagawa, Japan.
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