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*The ''East-West Schism'' of 1054 was the separation of the [[Eastern Orthodox Church]] and Western ("[[Roman Catholic]]") branches of the Christian Church.

*The ''East-West Schism'' of 1054 was the separation of the [[Eastern Orthodox Church]] and Western ("[[Roman Catholic]]") branches of the Christian Church.

*The ''Western Schism'' (1378-1417) was an argument within the Roman Catholic Church resulting in French cardinals electing an "[[antipope]]" (Clement VII of Avignon, France) in order to dispute the authority of the recently elected Pope Urban VI. In 1409, a third antipope (John XXIII) existed in Pisa, Italy.<ref>Catholic Encyclopedia 1913, http://www.newadvent.org/cathen/13539a.htm</ref> This and other controversies set the stage for the Protestant Reformation.

*The ''Western Schism'' (1378-1417) was an argument within the Roman Catholic Church provoked by the French bishops resulting in French cardinals electing an "[[antipope]]" (Clement VII of Avignon, France) in order to dispute the authority of the recently elected Pope Urban VI, even though he had been lawfully elected by the majority of the [[cardinal]]s in the electoral conclave. In 1409, a third antipope (John XXIII) existed in Pisa, Italy.<ref>Catholic Encyclopedia 1913, http://www.newadvent.org/cathen/13539a.htm</ref> This and other controversies set the stage for the Protestant Reformation.

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