Mona Lisa model was a woman ... and maybe a man, too

The smile on Leonardo Da Vinci's Mona Lisa painting is so enigmatic, many art historians and fans have tried to figure her out. Photo: AFP

Mona Lisa's enigmatic smile draws millions of viewers from across the world, all eager to see the art world's most famous female face. But is it?

An Italian art detective is arguing that research backs his long-standing claim that Leonardo Da Vinci used both a female and male model to create the acclaimed portrait that hangs in Paris' Louvre museum.