The painting entitled "Old Woman," but better known as the "Ugly Duchess," is one of the most popular in London's National Gallery. It depicts the face of a grotesquely-featured woman, and was painted by Flemish artist Quinten Massys in 1513. Now, experts believe that they have identified the illness suffered by this woman as a rare form of Paget's disease, which deforms the bones. (photo)
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