Overview

• The 42nd Journées européennes du patrimoine runs Saturday–Sunday, 20–21 September 2025, under the theme “patrimoine architectural.”
• Château de La Brède opens its interior to the public for the first time, 10:00–18:30, with new exhibits on Montesquieu’s travels and on Jacqueline de Chabannes.
• In Marseille, Grotte Cosquer operates continuously from 9:30 to 19:30 with included animations and conferences, and the new Sainte‑Marguerite Dromel tram maintenance center welcomes exclusive public visits guided by RTM teams.
• Universities, grandes écoles and renowned lycées nationwide offer guided tours, exhibitions and workshops, including the Cité internationale universitaire de Paris, ENM Bordeaux and sites such as Henri‑IV, Saint‑Charles and Janson de Sailly.
• Local programs range from medieval-themed activities in Velaux and heritage walks at Miramas’s Poudrerie to standout South‑West visits such as Fort Louvois, the château‑fort de Bonaguil and the restored château de Bouteville.