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Many paintings in the Gallery once looked quite different from how they do today. Sometimes artists themselves have made changes. In other cases, transformations have been brought about by accident, or through the intentional interventions of dealers and restorers.

Close Examination: Fakes, Mistakes and Discoveries explores some of the stories of change and transformation behind paintings in the National Gallery.  

These case studies show how scientific analysis can help detect changes, and how researchers interpret the results to understand why they occurred. Find out about some surprising discoveries made through close examination: