If you’re going to tour the Philip Johnson Glass House with Barry Bergdoll, Philip Johnson Chief Curator of Architecture and Design at MoMA, you better be prepared for a pop quiz. This is a man who thrives on complex conversations, and he took us for a wild ride last night at the final Conversation in Context event for this season. (Regular tours are available for two more weeks – book your ticket today.) Bergdoll’s questions included “How did the Glass House evolve out of Johnson’s debates with Ludwig Mies van der Rohe and Karl Friedrich Schinkel?” And “In the 1930s, the entrance to the Museum of Modern Art was a revolving door at street level. Can you think of any other museum that had a revolving door at that time?” (We couldn’t.) “Why not?” Post a comment with your response, or join an online conversation at the Glass House website. A video of the tour with Barry Bergdoll will be posted soon.