Boulogne-Billancourt
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Boulogne-Billancourt (often called Boulogne or Boulbi) is a town in the western suburbs of Paris in France. Boulogne-Billancourt is a sub-prefecture of the Hauts-de-Seine département. It is in the Île-de-France region. Its population is around 106,000. Its land area is 6.17 km². Its population density is 17,877/km².
Boulogne-Billancourt is one of the most densely populated municipalities in Europe. Several major communication companies headquarters are in Boulbi. The hospital Ambroise-Paré Hospital is in the city and one campus of the École supérieure des sciences commerciales d'Angers.