Redirected from Boulogne-sur-Seine
In 1924, the city changed its name: Boulogne-sur-Seine became officially Boulogne-Billancourt.
... population is spread out with 29.0% under the age of 18, 5.0% from 18 to 24, 29.0% from 25 to 44, 24.2% from 45 to 64, and 12.7% who are 65 years of age or older. Th ...