The Mona Lisa is way over rated. Compared to the rest of the paintings in just that wing L’ouvre it’s easily the least impressive painting.
The Mona Lisa was stolen from the museum and copied multiple times in a forgery scam — the rich marks were carefully vetted, each paid a fortune for one of the forgeries, thinking he’d won the closed envelope auction, and when the original (apparently the original) was returned to the museum, none of the marks dared come clean in an effort to get their money back for the fake they’d paid for.
There’s also the Islesworth Mona Lisa, other sidebars:
http://www.freerepublic.com/tag/isleworthmonalisa/index
http://www.freerepublic.com/focus/news/2937799/posts