The light levels on the top floors are so low it is impossible to see anything on the walls or in the display cases. If the artifacts are so light-sensitive they should not be on public display at all. The attendants were way over the top as well. Shouting at anyone who got within a metre of the paintings or who took non flash photos. As far as I could make out in the gloom, apart from a few Singer Sargents, this collection was just a rich woman's junk badly displayed. Save your money & go instead to the Boston Fine Arts Museum round the corner for a world class collection, properly displayed with relaxed attendants.