The art world has yet to tackle issues around works like Picasso’s $115m child-prostitute portrait

Dealing dynasty says that the painting bought in the Rockefeller sale will be loaned to the Musée d’Orsay

Leaning on romance of Rockefeller name and its appeal to international and first-time buyers, the auction house triumphed in its marathon week of sales

Ahead of the sale of the David and Peggy Rockefeller collection at Christie’s this week, the family's archivist examines their approach