FILE - In this undated file photo released by the Isabella Stewart 

FILE - In this undated file photo released by the Isabella Stewart Gardner Museum shows the painting "Chez Tortoni" by Manet, one of more than a dozen works of art burglars stole during a 1990 heist in Boston. A Rotterdam museum art heist this week netted paintings by Pablo Picasso, Claude Monet, Henri Matisse and others — but it's not the first time that money-conscious thieves with an eye for beauty have targeted famous multimillion-dollar canvasses. (AP Photo/Isabella Stewart Gardner Museum)
Associated Press
FILE - In this undated file photo released by the Isabella Stewart Gardner Museum shows the painting "Chez Tortoni" by Manet, one of more than a dozen works of art burglars stole during a 1990 heist in Boston. A Rotterdam museum art heist this week netted paintings by Pablo Picasso, Claude Monet, Henri Matisse and others — but it's not the first time that money-conscious thieves with an eye for beauty have targeted famous multimillion-dollar canvasses. (AP Photo/Isabella Stewart Gardner Museum)
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