This world-famous artwork seen here was painted around 1505
So here is the challenge of Vasari: art historians believe it's the Louvre Mona 
Lisa that was... [DOC] [TLE] Mona Lisa | painting by Leonardo da Vinci | Britannica.com [PAR] Aug 17, 2016 ... Mona Lisa, oil painting on a poplar wood panel by Leonardo da Vinci, probably 
the world's most-famous painting.