Few artists have turned personal suffering into visual language as powerfully as Frida Kahlo . More than 70 years after her death, the Mexican  painter, who died in 1954, remains one of the most recognizable figures in art history. Her iconic unibrow and flower crowns have made her image instantly identifiable around the world, and her works have been sold for millions at auction. Her life and work are being celebrated at London's Tate Modern with the exhibition, " Frida: The Making of an Icon,"