Boulogne-Billancourt
Boulogne-Billancourt is city of France, sous-préfecture of the Hauts-de-Seine département, in the Ile-de-France région. In 1924, the city changed its name: Boulogne-sur-Seine became officially Boulogne-Billancourt.
In 1924, the city changed its name: Boulogne-sur-Seine became officially Boulogne-Billancourt.