The National Sound Library of Mexico has unearthed what they believe could be the first known voice recording of Frida Kahlo, taken from a pilot episode of 1955 radio show El Bachiller, which aired after her death in 1954. The episode featured a profile of Kahlo’s artist husband Diego Rivera. In it, she reads from her essay Portrait of Diego.
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https://www.youtube.com/watch?reload=9&v=HjTA2Dd8U9o