Watered by the Bièvre, a tributary of the Seine, Antony is located at the crossroads of very important transport routes, especially the main north-south axis which has existed for 2,000 years. Little urbanized until the early 20th century, the city grew considerably between the two wars, under Senator-Mayor Auguste Mounié, from 4,000 to 20,000 inhabitants. In the early 1960s the population quickly increased from 25,000 to 50,000 to accommodate the repatriated people from Algeria.