3rd city of Finistère by the number of inhabitants, it is especially Concarneau its "closed city" located on an island surrounded by stone walls. She suffered many sieges, the most famous in 1373 by Duguesclin who manages to drive out the English garrison.
Concarneau owed its rise to the sardine fishing for centuries, and then tuna. The port ranks third in competition with Boulogne and Lorient. Its maritime activities entrained development canneries (they will be thirty in the 1930s).

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