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* The [[Roman Catholic Church]] (approx. 1.1 billion baptized members) traces its roots back to [[Saint Peter]] whom Catholics believe was appointed as the first leader of the church by [[Jesus Christ]] and the succession of [[Pope]]s as the spiritual leaders of Christendom.  

* The [[Roman Catholic Church]] (approx. 1.1 billion baptized members) traces its roots back to [[Saint Peter]] whom Catholics believe was appointed as the first leader of the church by [[Jesus Christ]] and the succession of [[Pope]]s as the spiritual leaders of Christendom.  

* The [[Orthodox Church]]es (approx. 300 million baptized members) trace their roots back to the Apostles, and are organized in Autocephalous national or regional churches in communion with each other. Differing theological perspectives led to the [[Great Schism]] between the Roman Catholic Church and the Eastern Orthodox Churches in A.D. 1054.  

* The [[Orthodox Church]]es (approx. 300 million baptized members) trace their roots back to the Apostles, in the five ancient [[patriarchate]]s of the undivided Church of the first millennium of her history, known as the Pentarchy<ref>[https://orthodoxwiki.org/Pentarchy Pentarchy (orthodoxWiki.org)]</ref>, and are organized in Autocephalous national or regional churches in communion with each other. The Pentarchy consisted of the Churches of [[Church of Rome|Rome]], first in dignity of honor, [[Church of Constantinople|Constantinople]], [[Church of Alexandria (Coptic)|Alexandria]], [[Church of Antioch|Antioch]], and [[Church of Jerusalem|Jerusalem]]. Differing theological perspectives and the growing development of the doctrine of [[Petrine primacy]] in the Church of Rome led to the [[Great Schism]] between the Roman Catholic Church and the Eastern Orthodox Churches in A.D. 1054.  

   

   

* [[Protestantism]]: the largest Communions are the [[Anglican Church|Anglicans]] (approx. 115 million baptized members) and the [[Lutheran]] World Federation (approx. 68 million baptized members). Protestantism has its origins in the European [[Reformation]]. The Protestant movement broke from the Roman Catholic Church under [[Martin Luther]] when differences over the nature of [[faith]] and works in the role of [[Christianity#salvation|salvation]], as well as other practices of the Catholic Church that Luther saw as unBiblical, were raised.

* [[Protestantism]]: the largest Communions are the [[Anglican Church|Anglicans]] (approx. 115 million baptized members) and the [[Lutheran]] World Federation (approx. 68 million baptized members). Protestantism has its origins in the European [[Reformation]]. The Protestant movement broke from the Roman Catholic Church under [[Martin Luther]] when differences over the nature of [[faith]] and works in the role of [[Christianity#salvation|salvation]], as well as other practices of the Catholic Church that Luther saw as unBiblical, were raised.