The Guerilla Girls have been creating protest posters for 30 years - calling out the art world,using fact, statistics, shame and irony to call for then end to all forms of gender and racial inequality in galleries and among artists, collectors, and buyers. The group is anonymous and goes by pseudonyms such as Frida Kahlo and Käthe Kollwitz.
Frida Kahlo tells Megan Whelan why the group is more relevant now that ever.