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In page Spiritualism (movement):

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The second direction taken has been to adopt formal organization, patterned after Christian denominations, with established liturgies and a set of seven principles, and training requirements for mediums. In the United States the spiritualist churches are primarily affiliated either with the National Spiritualist Association of Churches or the loosely allied group of denominations known as the spiritual church movement; in the U.K. the predominant organization is the Spiritualists' National Union, founded in 1890.[citation needed]