Jeff Koons, “Hanging Heart (Magenta/Gold)” 1994-2006 - AUCTION HOUSE Sotheby’s, Nov. 14 - ESTIMATE $15 million to $20 million (Photo: Sotheby’s)

Jeff Koons, “Diamond (Blue)’’ 1994-2005 - AUCTION HOUSE Christie’s, Nov. 13 - ESTIMATE $12 million to $20 million (Photo: Christie’s)

Left : Mark Rothko, “Untitled (Black and Gray)’’ 1969 - AUCTION HOUSE Christie’s, Nov. 13 - ESTIMATE $10 million to $15 million (Photo: Christie’s)

Right : Mark Rothko, “Untitled " 1969 - AUCTION HOUSE Sotheby’s, Nov. 14 - ESTIMATE $12 million to $18 million (photo Sotheby's)

Paul Gauguin, "Te Poipoi (Le Matin)" 1892 - AUCTION HOUSE Sotheby’s, Wednesday - ESTIMATE $40 million to $60 million (Photo: Sotheby’s)

Andy Warhol, "Liz" 1963 - AUCTION HOUSE Christie’s, Nov. 13 - ESTIMATE $25 million to $30 million (Photo: Christie’s)

Paul Cézanne, “Le Jas de Bouffan’’ 1890-94 - AUCTION HOUSE Christie’s, Tuesday - ESTIMATE $12 million to $16 million (Photo: Christie’s)

Vincent van Gogh, “The Fields (Wheat Fields)’’ 1890 - AUCTION HOUSE Sotheby’s, Wednesday - ESTIMATE $28 million to $35 million (Photo: Sotheby’s)

Pablo Picasso, “Tête de Femme (Dora Maar)’’ 1950s - AUCTION HOUSE Sotheby’s, Wednesday - ESTIMATE $20 million to $30 million (Photo: Sotheby’s)

Henri Matisse, “L’Odalisque, Harmonie Bleue’’ 1937 - AUCTION HOUSE Christie’s, Tuesday - ESTIMATE $15 million to $20 million (Photo: Christie’s)

(source The New York Times)