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SALZBURG, AUSTRIA - NOVEMBER 18: A name-plate on the door of the house of Cornelius Gurlitt which stands in the well-to-do Aigen district on November 18, 2013 in Salzburg, Austria. Gurlitt reportedly stated recently that he refuses to return any of the over 1,400 works that might have been confiscated or forcibly bought at low prices by the Nazis from their original owners during Nazi rule in Germany. Gurlitt is the son of Hildebrand Gurlitt, an art dealer who worked with the Nazis and amassed the collection, which German police discovered last year in Cornelius Gurlitt's Munich residence. (Photo by Joerg Koch/Getty Images)

SALZBURG, AUSTRIA - NOVEMBER 18:  A name-plate on the door of the house of Cornelius Gurlitt which stands in the well-to-do Aigen district on November 18, 2013 in Salzburg, Austria. Gurlitt reportedly stated recently that he refuses to return any of the over 1,400 works that might have been confiscated or forcibly bought at low prices by the Nazis from their original owners during Nazi rule in Germany. Gurlitt is the son of Hildebrand Gurlitt, an art dealer who worked with the Nazis and amassed the collection, which German police discovered last year in Cornelius Gurlitt's Munich residence. (Photo by Joerg Koch/Getty Images)