Tour for the Art Addict

My wife's ideal trip to Venice, Florence and Rome would be one that involved seeing art museums and galleries in these three cities from 9am to 9pm every day. I am not that into art but would be willing to accompany her on her dream trip if we limited the "wall to wall" art to one week - then take a cruise or river cruise etc for a second week or two. What is the best trip from Tauck that would cover the most Italian art in about a week? Something that would hit all the famous sites and allow for a few brief excursions to lesser know art exhibits?
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