It is, I suppose, not positively bad, but it could have been infinitely better. It is pretentious, in that it uses the ancient Marbles to decorate itself. This is a long outmoded idea, and the exact opposite of what a sculpture gallery should do. And, although it incorporates them, it is out of scale, and tends to dwarf them with its bogus Doric features, including those columns, supporting almost nothing which would have made an ancient Greek artist architect wince. The source of daylight is too high above the sculptures, a fault that is only concealed by the amount of reflection from the pinkish marble walls.
Bernard Ashmole on the Duveen Gallery in the British Museum