The "Mona Lisa" is a half-length portrait of Lisa Gherardini by the Italian Renaissance artist Leonardo da Vinci, which has been described as "the best known, the most visited, the most written about, the most sung about, the most parodied work of art in the world".
"Mona Lisa" has no clearly visible eyebrows or eyelashes. Some researchers claim that it was common at this time for genteel women to pluck these hairs, as they were considered unsightly. In 2007, French engineer Pascal Cotte announced that his ultra-high resolution scans of the painting provide evidence that Mona Lisa was originally painted with eyelashes and with visible eyebrows, but that these had gradually disappeared over time, perhaps as a result of over cleaning. Cotte discovered the painting had been reworked several times, with changes made to the size of the Mona Lisa's face and the direction of her gaze. He also found that in one layer the subject was depicted wearing numerous hairpins and a headdress adorned with pearls which was later scrubbed out and overpainted.