premise: On your way through the Italian rooms, be sure to keep an eye peeled for Fra Angelico's glowing and stupendous Annunciation, as well as for Antonello da Messina's realistically detailed, intensely tragic Christ Sustained by an Angel, and Sandro Botticelli's The Story of Nastagio Degli Onesti.
hypothesis: You don't have to be careful when going through the Italian rooms, there's not much to see there.