The Catholic Church is comprised of 6 different liturgical rites, and within those rites, there are 24 Churches. These 24 Churches are all in communion with one another, are all within the Catholic Church, and all recognize the primacy of the pope.
Latin (or Roman) Catholic Church
Coptic Catholic Church
Eritrean Catholic Church
Ethiopian Catholic Church
Maronite Catholic Church
Syriac Catholic Church
Syro-Malankara Catholic Church
Armenian Catholic Church
Chaldean Catholic Church
Syro-Malabar Catholic Church
Albanian Catholic Church
Belarusian Catholic Church
Bulgarian Greek Catholic Church
Byzantine Church of Croatia, Serbia and Montenegro (or Križevci Catholic Church)
Greek Byzantine Catholic Church
Hungarian Greek Catholic Church
Italo-Albanian Catholic Church
Macedonian Catholic Church
Melkite Greek Catholic Church
Romanian Catholic Church
Russian Catholic Church
Ruthenian Catholic Church
(known as the Byzantine Catholic Church in America)
Slovak Catholic Church
Ukrainian Greek Catholic Church
The Eastern Orthodox schism, also known as the Great Schism or the East-West Schism, was a split in the Christian church that occurred in 1054. Causes: The schism was caused by a combination of political conflicts and religious disagreements between the Eastern (Byzantine) and Western (Roman) branches of the church. These differences included the use of unleavened bread in communion, and the use of Greek and Latin as the primary languages of the Eastern and Western churches, respectively. Not in communion with Latin (Roman) Catholic Church.