Russia's Prime Minister Vladimir Putin viewing the art collection of late cellist Mstislav Rostropovich and his widow Galina Vishnevskaya, displayed in Konstantinovsky Palace outside St. Petersburg on Monday, May 12, 2008. After Rostropovich's death this spring, Vishnevskaya decided to put the collection up for auction at Sotheby's in London, where it was bought last September by Russian billionaire Alisher Usmanov to be on permanent display in the palace outside St. Petersburg. (AP Photo/Dmitry Lovetsky)

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