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In page Nord-Pas-de-Calais:

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The region's ethnic diversity has been affected by repeated waves of immigrant workers from abroad: Belgians and Welsh before 1910; Poles and Italians in the 1920s and 1930s; Eastern European groups and Germans since 1945; and North Africans and Portuguese since 1960;[3] and large cities like Lille, Calais, and Boulogne-sur-Mer are home to sizable communities of British, Dutch, Scandinavian, Greek and Balkans, Sub-Saharan African, and Latin American immigrants and their descendants.[citation needed]