Impressionist and Modern auction sales kick off in London ; will test the strength of the global art market . immediately muffled himself up and went out and put his easel on the road in order to capture en plein air the extraordinary effect of the light , '' she explained . Price for Romantic and Modern artworks still high , in spite of problems in the global financial market . Star lots of sales at Bonhams and Sotheby 's include paintings by Raphael , Leonardo , Modigliani and Picasso . Prices stay high because of rarity of great works by Impressionist and Modern artists with historical provenance .
Impressionist and Modern auction sales kick off in London ; will test the strength of the global art market . Price for Romantic and Modern artworks still high , in spite of problems in the global financial market . Star lots of sales at Bonhams and Sotheby 's include paintings by Raphael , Leonardo , Modigliani and Picasso . Prices stay high because of rarity of great works by Impressionist and Modern artists with historical provenance .