The Headquarters of the Arianespace Company: A major commercial aerospace launcher, servicing companies who wish to launch satellites into space.
Château de Montlhéry: Originally having been an ancient fort during Roman times, the first feudal lords began to inhabit the castle around 1000 AD. One major battle was fought in the castle during its lifetime. In 1465, Charles the Rash and French King Louis XI fought in the plains in front of the castle. In 1842, the reconstruction of the castle was started, and currently is being maintained by the local town of Montlhery
The Forest of Sénart: Covering 3,500 hectares in area, this forest is very important to the local population. The local government has kept roads and agricultural companies from cutting down parts of this forest. There are roughly 2-3 million visitors a year, and the government spends 1.2 million euros a year maintaining the forest.
¹This group is made up largely of pieds-noirs from Northwest Africa, followed by former colonial citizens who had French citizenship at birth (such as was often the case for the native elite in French colonies), and to a lesser extent foreign-born children of French expatriates. Note that a foreign country is understood as a country not part of France as of 1999, so a person born for example in 1950 in Algeria, when Algeria was an integral part of France, is nonetheless listed as a person born in a foreign country in French statistics.
² An immigrant is a person born in a foreign country not having French citizenship at birth. Note that an immigrant may have acquired French citizenship since moving to France, but is still considered an immigrant in French statistics. On the other hand, persons born in France with foreign citizenship (the children of immigrants) are not listed as immigrants.