Lebanese Greek Orthodox Christians (Arabic: المسيحية الأرثوذكسية الرومية في لبنان) refers to Lebanese people who are adherents of the Greek Orthodox Church of Antioch in Lebanon, which is an autocephalous Greek Orthodox Church within the wider communion of Eastern Orthodox Christianity, and is the second-largest Christian denomination in Lebanon after the Maronite Christians. Lebanese Greek Orthodox Christians are believed to constitute about 8% of the total population of Lebanon. Most of the Greek Orthodox Christians live either in the capital city of Beirut, the Metn hinterland, the Hasbayya and Rashayya districts in the southeast, and the North Governorate, in the Koura region (south of Tripoli) and Akkar. Under the consensus of the unwritten agreement known as the National Pact among the different political leaders of Lebanon, the Deputy Speaker of the Parliament of Lebanon and the Deputy Prime Minister of Lebanon are assumed to be Greek Orthodox Christians. History The Greek Orthodox Church of Antioch adheres to the Eastern Orthodox Church, which is composed of several autocephalous jurisdictions united by common doctrine and by their use of the Byzantine rite. They are the second largest Christian denomination within Christianity in Lebanon. Historically, these churches grew out of the four Eastern Patriarchates (Jerusalem, Antioch, Alexandria, and Constantinople) of the original five major episcopal sees (the Pentarchy) of the Roman Empire, which included Rome. The final split between Rome and the Eastern Churches, who came to oppose the views and claims of the Popes of Rome, took place in 1054. From that time, with the exception of a brief period of reunion in the fifteenth century, the Eastern Churches have continued to reject the claims of the Patriarchate of Rome (the Catholic Church) to universal supremacy and have rejected the concept of papal infallibility. Doctrinally, the main point at issue between the Eastern and Western Churches is that of the procession of the Holy Spirit, and there are also divergences in ritual and discipline. The Greek Orthodox include many free-holders, and the community is less dominated by large landowners than other Christian denominations. In present-day Lebanon, Eastern Orthodox Christians have become increasingly urbanized, and form a major part of the commercial and professional class of Beirut and other cities. Many are found in the Southeast (Nabatieh/Beqaa) and North, near Tripoli. They are highly educated and well-versed in finance. The Greek Orthodox church has become known in the Arab world, possibly because it