In response to the question "How do you know when you're finished?" Jackson Pollock once made the reply, "How do you know when you're finished making love?"
Whereas highly valued masterpieces were rare in 2009, reassured sellers sent top-tier works from Giacometti to Picasso tumbling across the auction block in 2010.
Picasso once again proved his staying power as a 1932 portrait of his muse Marie Therese, Nude, Green Leaves and Bust, sold for $106.5 million, a record at auction.
Cartier-Bresson covered the shiny lens of a Nikon with black tape so his subjects would be less inclined to notice him, and took to the streets. What he invented there was essentially photojournalism.