The book launch for the 37th volume of the Cahiers de Vallesia—the fourth in the series dedicated to the Mémoires du Rhône conference—was held on 25 June at the Arsenaux in Sion. Entitled Le Rhône. Imaginaires, frontière et trait d’union, the volume brings together contributions from the two most recent conferences, including a chapter co-authored by Dr. Sara Formery, Dr. Martine Laprise, and Prof. Emmanuel Rey presenting the work carried out as part of the RHODANIE URBAINE project, initiated and developed by the Laboratory of Architecture and Sustainable Technologies (LAST).