The Bois Saint-Denis lies south of town, between the Paris road and the railway. This neighborhood grew out of the construction of stables, which got further and further from the center of town as land became more scarce. Forest parcels belonging to the Duke of Aumale began to be developed in 1890. While this neighborhood was originally within Gouvieux, it became part of Chantilly in 1928. It was then composed of brick stables, trainer residences and lodgings for the lads and jockeys. For a long time it was almost entirely devoted to racing, but over time, beginning in the 1960s, many stables were demolished or transformed into apartment buildings or housing subdivisions. Building codes now specifically protect this heritage and these racing activities.