Roscoff (; ) is a commune in the Finistère département of Brittany in northwestern France. Roscoff is renowned for its picturesque architecture, labelled (small town of character) since 2009. Roscoff is also a traditional departure point for Onion Johnnies. After lobbying by local economic leaders headed by Alexis Gourvennec, the French government agreed in 1968 to provide a deep-water port at Roscoff. Existing ferry operators were reluctant to take on the relatively long Plymouth–Roscoff crossing so Gourvennec and colleagues founded Brittany Ferries. Since the early 1970s Roscoff has been developed as a ferry port for the transport of Breton agricultural produce and for motor tourism. Brittany Ferries link Roscoff with both Ireland and the United Kingdom. Owing to the richness of iodine in the surrounding waters and the mild climate maintained by a sea current that varies only between , Roscoff is also a centre of post-cure, which gave rise to the concept of thalassotherapy in the latter half of the 19th century. A French doctor, Louis-Eugène Bagot, opened the Institut Marin in Roscoff in 1899, the first centre for thalassotherapy in Europe. Since then many important centres of thalassotherapy such as the Institut de Rockroum (originally Institut marin), the clinic Kerléna and a heliomarin hospital founded in 1900, the Perharidy Centre, can be found by the sea at Roscoff. The nearby Île de Batz, called in Breton, is a small island that can be reached by launch from the harbour. Sights Roscoff parish church Our Lady of Croaz Batz (Notre Dame de Croaz Batz): Renaissance and Gothic church from the 16th century The house known as "that of Mary, Queen of Scots" The Station Biologique de Roscoff, a research laboratory in oceanography and marine biology The Jardin Exotique de Roscoff The Onion Johnny museum Population Inhabitants of Roscoff are called in French Roscovites. Breton language The municipality launched a language plan through Ya d'ar brezhoneg on 14 November 2008. In 2008 18.44% of primary-school children attended bilingual schools. Ferries Brittany Ferries operate ferry services from Roscoff to Plymouth daily from February to November with occasional Christmas sailings, to Cork twice a week (Friday and Tuesday service). Irish Ferries used to operate a ferry service from Roscoff to Rosslare from May to September but now sail to Cherbourg instead. Historic events In 1375 the harbour was destroyed by English forces under the Earl of Arundel. It would later be rebuilt