Nathanial Kahn is a director and producer.  He is also the son of architect Louis Kahn, one of the most influential architects of the 20th century.  In 2003, he produced the Oscar-nominated film My Architect about the life and work of his dad, interviewing people who knew Kahn including Frank Gehry, Philip Johnson, and I.M. Pei.  Kahn created modern buildings with the feel and presence of ancient ruins using concrete.  His brilliant projects include the Four Freedoms Park, the Phillips Exeter Library, the Salk Institute, and his most famous work, the National Assembly building in Bangladesh. Alexandra Lange is the architecture critic for Curbed and a columnist at Dezeen.  She is a rising authority and a prolific writer for print and digital publications like Architect, Domus, Dwell, Metropolis, New York Magazine, and the New York Times.  Previously a Loeb fellow at the Harvard Graduate School of Design, she taught architecture criticism at New York University and is a leader in the new breed of digital curators, people who curate visually interesting exhibits you see on your screen and not inside a brick and mortar gallery or museum. She is the author of Writing About Architecture: Mastering the Language of Buildings and Cities.