Barry Bergdoll, The Philip Johnson Chief Curator of Architecture and Design, The Museum of Modern Art, and professor, Columbia University. In the fifth lecture, originally delivered at the National Gallery of Art on May 5, 2013, architectural historian Barry Bergdoll discusses the establishment, by the 1920s, of exhibitions as a culture of architecture in which one exhibition served as a critique of another, and the exploitation of the propaganda capacity of the exhibition by political agencies, corporations, and the ongoing politics of diplomacy.