"How do I know this isn't a prank?" the winner asked when he answered a video call from Christie's auction house in Paris.

Number of tickets to win Tête de Femme will be capped at 120,000 and proceeds will go to Alzheimer’s research

At 6 p.m. in Paris tonight, the Fondation Recherche Alzheimer charity will hold its annual raffle, this one featuring a $1 million-plus Picasso of his muse Dora Maar.