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Technology Helps Restore Paintings by Old Masters

In the late 16th century, the Spanish artist El Greco created a huge painting, 1 meter by 2 meters, titled Saint Martin and the Beggar. In the first half of the 20th century, the canvas was covered with protective varnish that over the course of decades caused discoloration. Conservators at the National Gallery of Art, in Washington, D.C., are now restoring the painting in preparation for a series of exhibitions marking the 400th anniversary of the famous painter’s death.   Often...

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