New in Theaters: ‘National Gallery’

A Q-tip can fix the grandest painting in ‘National Gallery’ (Zipporah Films)

Every year or so, Frederick Wiseman produces another documentary, normally of unusual length, that sneaksbehind the scenes of institutions ranging from the University of California-Berkeley to a boxing gym. His newest spends three hours wandering like a fascinated ghost around London’s National Gallery. It’s not his best, but still a fascinating piece of work.

National Galleryis opening this week in limited release. My...