Montlhéry, Administrative commune in Essonne, France
Montlhéry is a commune in the Essonne department, located roughly 26 kilometers south of Paris. The town contains residential areas, public facilities, and a castle that shapes the local landscape.
The commune developed as a strategic settlement along the Paris-Orléans road, a vital trade route. In the early 13th century, the castle here was reconstructed and strengthened under King Philip II.
The town maintains a sister relationship with the German municipality Stetten am kalten Markt, fostering regular exchanges between residents. This partnership shapes how people in both communities connect and understand each other.
The town hall is located on rue Blanche de Castille and serves visitors on weekdays and Saturday mornings. This is where to find municipal services and local information when you need assistance.
Scientist François Arago conducted speed of sound experiments from the castle tower in 1822 by using cannon shots as measuring points. These early scientific measurements turned the location into a site of significant physics research.
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