For two days, meetings and debates, screenings of films and documentaries, signing sessions, reading workshops and creative activities for children will follow one another in the heart of the Marais, in the superb setting of the hotels of Guénégaud and Mongelas. This edition will be exceptional for two reasons: on the one hand because the Museum will exhibit rare manuscripts by Maurice Genevoix, cantor of nature, recently acquired by the National Library of France - partly thanks to sponsorship from our Foundation -, on the other hand because 2023 will mark the fiftieth anniversary of the death of François Sommer (1904-1973), companion of the Liberation, precursor and visionary who devoted his life to the enhancement and protection of living and wild nature. An opportunity to return to this extraordinary personality and more broadly, to the French history of nature protection.