Timeline

Heritage classified

Key figures

Origin and history

The Mont-Gros observatory, located in La Trinité near Nice, was initiated in 1878 by the banker Raphaël-Louis Bischoffsheim, passionate about astronomy. He entrusted the architectural project to Charles Garnier, famous for the Paris Opera, who designed 15 original buildings, including the large dome made with Gustave Eiffel. The site, located 370 metres above sea level in the heart of a 35-hectare forest, includes botanical trails and a 250-tree olive grove planted by Garnier. The dome, with a diameter of 23.90 metres and weighing 100 tonnes, is based on an innovative hydraulic system with an anti-freezing ring float.

The astronomical bezel of the Grand Equatorial, 18 metres long with a lens of 76 cm, was operational in 1888 and was then the largest in the world. It allowed astronomer Auguste Charlois to discover 140 asteroids. The entrance gate, adorned with a golden copper statue representing the Engineering of Science (1884), symbolizes the alliance between art and science. The site, classified as a Historic Monument in 1992 and 1994, merged in 1988 with the CERGA to form the Observatoire de la Côte d'Azur.

The observatory played a key role in astronomical and geodynamic research. In 2001, he obtained the 20th Century Heritage label, recognizing his pioneering architecture and scientific heritage. Today, integrated into a Natural Zone of Ecological Interest (ZNIEFF), the site extends over 2,907 hectares and remains a place of discovery, used as a setting in films (Magic in the Moonlight by Woody Allen) or music clips (Angèle, Hyphen Hyphen).

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