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A police officer walks by a poster showing a painting by Italian artist Antonello da Messina outside the National Galley in London's Trafalgar Square, Wednesday, Dec. 13, 2023. The National Galley will mark 200 years of existence on May 10, 2024 when, to celebrate the anniversary, 12 exhibitions will open on the same day, at 12 museums and galleries across the 12 regions of the four nations of the United Kingdom. (AP Photo/Vadim Ghirda)