Pyramide de Cassini, Historic geodesic monument in Villejuif, France.
The Cassini Pyramid stands as a stone obelisk structure located along the former National Route 7 in the Val-de-Marne department.
Built in 1742 by Jacques Cassini, this monument served as a reference point for measuring the Paris meridian and creating the first detailed map of France.
The pyramid represents the advancement of French scientific achievements in the 18th century, particularly in the fields of cartography and geodesy.
Visitors can reach the monument at 157 bis Avenue de Paris in Villejuif by passing through a black gate and climbing an uneven staircase.
The structure functions as one of the remaining geodesic markers used for triangulation measurements during the creation of the Cassini map of France.
Location: Villejuif
Operator: Ville de Villejuif
GPS coordinates: 48.79840,2.36614
Latest update: June 23, 2025 09:56
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