Throughout the museum, the iPad offers options for learning about items in the collection. “There is only so much information you can put on a wall, and no one walks around with catalogs anymore,” Mr. Franklin said. One of the app’s simplest features is also one of the most effective: in many cases, it can produce a photo of the artwork’s original setting — seeing a tapestry in a room filled with tapestries, rather than in a white-walled gallery, is revelatory.