Hidden Frida Kahlo: Lost, Destroyed or Little Known Works. In this fascinating look at over 180 "hidden" images Helga Prignitz-Poda, one of the world's leading authorities on the Mexican artist, pulls back the curtain on masterpieces that rarely, if ever, see the inside of an exhibition or gallery. Arranged chronologically, the works include those Kahlo completed in her youth, works from her travels to America, paintings she made as an instructor in Mexico City, and a number of still-lifes from the last phase of her career.