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Description
In the 18th century, François Cassini de Thury was tasked with drawing a map of France by Louis XV. He created an observatory to draw the first map of the region on a scale of 1:86,400 thanks to the newly discovered triangular measurement technique.
Technical Information
Altimetric profile
Additional information
Price(s)
Free access.
Updated by
Destination Monts du Lyonnais - 19/11/2025
www.montsdulyonnaistourisme.fr
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Open period
All year round.
Contact
Phone : 04 82 90 10 85
Email : contact@montsdulyonnaistourisme.fr
Facebook : https://www.facebook.com/montsdulyonnaistourisme/
IGN cards
Animals
Yes
