Mona Lisa
Leonardo da Vinci c. 1503-1506
Stolen from the Louvre in 1911 — and it was the two-year manhunt that made her the most famous painting on earth.
Leonardo da Vinci began the Mona Lisa in Florence in the early sixteenth century and appears to have kept refining it for years, carrying the portrait with him as he adjusted its smoky transitions, hands, and famously elusive expression. That prolonged, almost meditative process is one reason the painting became one of the most studied and enigmatic images in art history.
Intro source: Wikipedia (EN)
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