I saw this movie on an airplane coming back from Italy, and haven't been able to find it since - so good luck. If you do succeed in finding it, you're in for a treat. Its captivating portrayal of Florence's allure is great. Also, one of the larger themes of the movie is a contemplation of the art of being a 'faker', someone who copies great works of art, in this case, paintings.
The plot: a painting by a classic Italian painter is suspected to be hidden in an old building in Florence. A young American pursues. The supporting characters aren't bad, the love interest holds up okay - of particular strength is the old 'faker'.