As Notre Dame reopens after its catastrophic fire, Patrick Geoghegan looks at the construction and re-construction of one of the most iconic cathedrals in the world. Joining him are: Dr Emily Guerry, Senior Lecturer in Medieval European History at the University of Kent, Dr Caroline Bruzelius, Professor Emerita of Art and Art History at Duke University, Dr Jennifer M. Feltman, Associate Professor of Art History and Medieval Art at the University of Alabama, and Dr Meredith Cohen, Associate Professor of Medieval Art and Architecture at UCLA.