The castle of Chevreuse was built between the 11th and 15th centuries. The castle of Chevreuse was built between the 11th and 15th centuries. The castle overlooks the city of Chevreuse and the Yvette river valley. The castle overlooks the city of Chevreuse and the Yvette river valley. The main gate was built in the 15th century. The keep was built in the 11th century. Château-LandonCourances castle Labels