dome. Porte Saint-Denis The porte Saint-Denis is part of an unfinished pavilion originally intended to provide symmetry with the current entrance of the Great Stables, on the other side of the open-air stables. When the Duke of Bourbon died in 1740, only this portion remained unfinished when construction stopped. This pavilion was to mark the entrance to the burgeoning city. Its name came from the old land holdings of the Abbey of Saint-Denis, which was once very close to the château. Urban development As a city, Chantilly is less than 250 years old. The oldest part is the rue du Connétable, which began in 1727 as a planned allotment called "the officials' housing", allocated from part of the château estate. These buildings are now numbered 25 through 67 on the rue du Connétable. The rest of the neighborhood was sold to the end of the main street, where the Condé hospice stood before the French Revolution. After 1799, the town spread over the old footprint of the château gardens, with street names recalling the different gardens and sometimes following their old paths. The rue des Potagers, rue de la Faisanderie, and rue des Cascades are examples of this, i.e. Vegetable Street, Pheasantry Street and Waterfall Street. Street numbers here begin from the château rather than from the place Omer Vallon as in other neighborhoods. Development took the form of town houses, small 19th century buildings and other villas surrounded by gardens. Traces also exist of old stables dating from the beginnings of the racehorse community at the start of the 19th century. Along the avenue du maréchal Joffre development was tied to the Paris road and the arrival of the railway. The station is at the end of the avenue. Here small buildings and villas built in the 19th and 20th century reflect the residential nature the town took on in this period. The area has become progressively more built up as villas and their gardens were replaced with private residences and master houses were transformed into multi-family dwellings. Chantilly has three outer neighborhoods: 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