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On the sad occasion of the 1st anniversary of the fire at Notre-Dame Cathedral in Paris, let's take stock of its reconstruction. The Science Mag begins with Philippe Dillmann of the CNRS, Head of Coordination of ongoing research on the cathedral, filming at the chevet of Notre-Dame (construction site base): a look back at the fire of April 15, 2019, archives in stone and materials, goals of the various CNRS working groups on Notre Dame. Jérôme Bonaldi then takes us to the Exploradôme in Vitry sur Seine, where he explains the main principles of vault construction. Then, head to La Cité de l'Architecture for a story on Eugène Viollet-le-Duc, architect of the famous spire of Notre Dame, and to meet Aline Magnien, Director of the Laboratory for Research on Historical Monuments, who explains what the LRMH is working on, and deciphers the construction method of Notre-Dame to help rebuild it better. Then, a short report in Switzerland on the study of the promises of wooden frames (3rd major construction material). And finally, a column on the different futures of Notre-Dame with Emilie Rauscher, journalist from the editorial staff of the magazine Science et Vie. ➨ Subscribe: http://bit.ly/1BnBIiK ➨ Science & Vie TV, the site: http://www.science-et-vie.tv ➨ Facebook http://on.fb.me/1B9MsSK ➨ Twitter http://bit.ly/1DP3MlK