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Catholic–Eastern Orthodox relations |
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Overview |
Sister churches was a term used in 20th-century ecclesiology to describe ecumenical relations between the Roman Catholic Church and the Eastern Orthodox Churches, and more rarely and unofficially, between the Roman Catholic Church and the Anglican communion. The Catholic Church has since called on theologians to avoid the term, clarifying that "one cannot properly say that the Catholic Church is 'sister' of a particular Church or group of Churches. This is not merely a question of terminology, but above all of respecting a basic truth of the Catholic faith: that of the unicity [uniqueness] of the [Catholic Church]." The term is also currently used among Protestants to refer to different denominations of the same religious tradition.