I went to the "Gemme dell'Impressionismo" tour a couple of months ago, and I loved it!!! Our guide (Cecilia Marzi) stopped to explain every single painting in the gallery, and she knew so much on the impressionists. As an art enthusiast, I really enjoyed it and would be glad to do it again. The specific tour I did was in Italian, but she also speaks English and, apart from having a vast knowledge of art history, she also knows how to do the different techniques they used in ancient Rome or the Renaissance (affresco, mosaics, watercolor etc.) and art restoration. I would highly recommend any of her tours or workshops