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Chlef is the capital of Chlef Province, Algeria. Located in the north of Algeria, 200 kilometres (120 mi) west of the capital, Algiers, it was founded in 1843, as Orléansville, on the ruins of Roman Castellum Tingitanum. In 1962, it was renamed al-Asnam, but after the devastating earthquake on October 10, 1980, it has borne its present name, Chlef, which is derived from the name of the Chelif River, the longest river in Algeria.