(2)A new theory proposes that Leonardo da Vinci's The Last Supper contains a hidden image of a woman holding a child. The figures purportedly appear when the original painting is superimposed with its mirror image (pictured: the 'woman' leans across the group in Christ's direction). For more on the theory, check out this article(1) in the Telegraph UK.

1. http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2007/07/30/wvinci130.xml
2. http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2007/07/30/wvinci130.xml