Copying Old Masters

When I lived in Russia I always saw art students painting fragments of the famous paintings in the museums. And last time in Paris, I saw a couple of artists painting a relatively huge canvases in Louvre. It must be hard to paint when thousands of people watching you during the day! I prefer good quality photos (though I wouldn't mind to go to Paris again :)
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The piece you see above is my try. The challenge was that I had to transform oil painting (a fragment) into a watercolor "reading".. I loved to paint grapes on this one and small bugs too..
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8"x9" Watercolor on 140 lb Cold Pressed Arches