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In page Rurik:

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Rorik of Dorestad reappeared in Frankish chronicles in 870, when his Friesland demesne was returned to him by Charles the Bald. In 882, Rorik is mentioned as dead (without a specific date of death).[citation needed] The Primary Chronicle places the death of Rurik of Novgorod in 879,[2] three years earlier than the Frankish chronicles. According to western sources, the ruler of Friesland was converted to Christianity by the Franks.[citation needed]