Brie is a historic region of France most famous for its dairy products, especially Brie cheese. It was once divided into two sections ruled by different feudal lords: the western Brie française, corresponding roughly to the modern département of Seine-et-Marne in the Île-de-France région; and the eastern Brie champenoise, forming a portion of the modern département of Marne in the historic region of Champagne (part of modern-day Champagne-Ardenne).
The Brie forms a plateau with few eminences, varying in altitude between 300 and 500 feet in the west, and between 500 and 650 feet in the east. Its scenery is varied by forests of some size—the chief being the Forêt de Senart, the Forêt de Crécy and the Forêt d'Armainvilliers. The surface soil is clay in which are embedded fragments of siliceous sandstone, used for millstones and constructional purposes; the subsoil is limestone. The Yères, a tributary of the Seine, and the Grand Morin and Petit Morin, tributaries of the Marne, are the chief rivers, but the region is not abundantly watered and the rainfall is only between 20 and 24 inches.