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César François Cassini de Thury (1714-1784)



Cassini was the son of Jacques Cassini and the third descendant of the Genoese family of Cassini that settled in Paris in 1671 at the request of Minister Colbert for the construction of the Observatoire de Paris.

Scientist, astronomer, like his ancestors, he defined the study of the base meridian which allowed him to create the map of France which takes its name.

It was created when he was Director of the Académie des Sciences et de l'Observatoire de Paris at the request of King Louis the XV.

The "Carte de Cassini" consists of 180 folios which measure 104 x 73 154 cm and 26 with various measures at the scale of 1/86400.