Renaissance fresco features face of Pope's mistress

The fragment of a fresco painted during the time of the Borgia's is causing some consternation in the Vatican with its depiction of Pope Alexander VI kneeling at the feet of his mistress Giulia Farnese.

In the painting, the Pope kneels before the Virign Mary who is said to bear the face of Alexander's mistress. It was commissioned from Pinturicchio in the 15th century and has been documented as having hung in the Pope's bedroom.