Built at the start of the 18th century, the castle of the Haras National du Pin (national stud farm) was the residence of the successive directors of the stud farm before being opened to visitors. They can observe its salons, its dining room, and the bedrooms of Emperor Napoleon III and Empress Eugénie. The tour plunges visitors into the Age of Enlightenment and allows them to discover precious furniture as well as multiple animal paintings, 17th-century tapestries, and equestrian trophies.