About Boulogne-sur-Mer
Boulogne-sur-Mer is a city in Northern France. Boulogne lies on the Côte d'Opale, a tourist coast on the English Channel, and is the most-visited location in its region after the Lille conurbation. Boulogne was the major Roman port for trade and communication with Britain. After a period of Germanic presence following the collapse of the Empire, Boulogne was at the centre of an eponymous county of the Kingdom of France during the Middle Ages, and was occupied by the Kingdom of England numerous times due to conflict between the two nations. Boulogne's 11th century belfry is one of 56 in northeastern France and Belgium with shared World Heritage Site status. There is also a Mediaeval Castle, a Cathedral from a number of historical periods and the National Sea Centre of France called Nausicaä. The climate produces mild winters and warm summers with rainfall all year, but most rainfall occurs between September and January.