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In page Athanasian Creed:

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The Creed's wording thus excludes Sabellianism and Arianism and the Christological heresies of Nestorianism and Eutychianism. A need for a clear confession against Arianism arose in Western Europe when the Ostrogoths and Visigoths, who had Arian beliefs, invaded at the beginning of the 5th century.[citation needed]