Places : Château de Chantilly

Château de Chantilly is located 40km north of Paris - an approximate forty-five minute drive. Wikipedia lists it as a historic château - aren't they all historic though?
As part of our historical reading in my french class last semester, we read the memoirs of Madame de Sévigné, and our french teacher advised that we visit the Château de Chantilly as this was where where some of her writings regarding the life of the court were set.