Christianity in Iran

Christianity in Iran dates back to the early years of the faith, pre-dating Islam. It has always been a minority religion relative to the majority state religions (Zoroastrianism before the Islamic conquest, Sunni Islam in the Middle Ages and Shia Islam in modern times), though it had a much larger representation in the past than it does today. Christians of Iran have played a significant part in the history of Christian mission. Currently there are at least 600 churches and 500,000–1,000,000 Christians in Iran.
Major denominations.
A number of Christian denominations are represented in Iran. Many members of the larger, older churches belong to minority ethnic groupsthe Armenians and Assyrians having their own distinctive culture and language. The members of the newer, smaller churches are drawn both from the traditionally Christian ethnic minorities and converts from non-Christian background.
The main Christian churches are:
According to Operation World, there are between 7,000 and 15,000 members and adherents of the various Protestant, Evangelical and other minority churches in Iran, though these numbers are particularly difficult to verify under the current political circumstances. 
The International Religious Freedom Report 2004 by the U.S. State Department quotes a somewhat higher total number of 300,000 Christians in Iran, and states the majority of whom are ethnic Armenians followed by ethnic Assyrians.
The "Country Information and Guidance: Christians and Christian Converts, Iran" report published in December 2014 by the Home Office of the United Kingdom states there are 370,000 Christians in Iran.
History.
According to the "Acts of the Apostles" there were Persians, Parthians and Medes among the first new Christian converts at Pentecost. Since then there has been a continuous presence of Christians in Iran.
During the apostolic age Christianity began to establish itself throughout the Mediterranean. However, a quite different Semitic Christian culture developed on the eastern borders of the Roman Empire and in Persia. Syriac Christianity owed much to preexistent Jewish communities and to the Aramaic language. This language had been spoken by Jesus, and, in various modern Eastern Aramaic forms is still spoken by the ethnic Assyrian Christians in Iran, northeast Syria, southeast Turkey and Iraq today (see Assyrian Neo-Aramaic, and Senaya language).
From Persian-ruled Assyria (Assuristan), missionary activity spread Eastern-Rite Syriac Christianity throughout Assyria and Mesopotamia, and from there into Persia, Asia Minor, Syria, the Caucasus and Central Asia, establishing the Saint Thomas Christians of India and erecting the Nestorian Stele and the Daqin Pagoda in China.
Early Christian communities straddling the Roman-Persian border found themselves in the midst of civil strife. In 313, when Constantine I proclaimed Christianity a tolerated religion in the Roman Empire, the Sassanid rulers of Persia adopted a policy of persecution against Christians, including the double-tax of Shapur II in the 340s. The Sassanids feared the Christians as a subversive and possibly disloyal minority. In the early-5th century official persecution increased once more. However, from the reign of Hormizd III (457–459) serious persecutions grew less frequent and the Persian church began to achieve a recognised status. Through the Battle of Avarayr (451) and the resultant treaty of 484, for example, the Persian Empire's numerous Armenian subjects gained the official right to profess Eastern Christianity freely. Political pressure within Persia and cultural differences with western Christianity were mostly to blame for the Nestorian schism, in the course of which the Roman Empire church hierarchy labelled the Church of the East heretical. The bishop of Ctesiphon (the capital of the Sassanid Empire) acquired the title first of catholicos, and then patriarch, completely independent of any Roman/Byzantine hierarchy.
Some regard Persia as - briefly - officially Christian. Khosrau I, Shahanshah from 531 to 579, married a Christian wife, and his son Nushizad was also a Christian. When the king was taken ill at Edessa a report reached Persia that he was dead, and at once Nushizad seized the crown and made the kingdom Christian ( 550). Very soon the rumour proved false, but persons who appear to have been in the pay of Justinian persuaded Nushizad to endeavour to maintain his position. The actions of his son deeply distressed Khosrau; he had to take prompt measures, and sent the commander, Ram Berzin, against the rebels. In the battle which followed Nushizad was mortally wounded and carried off the field. In his tent he was attended by a Christian bishop, probably Mar Aba I, the Patriarch of the Church of the East from 540 to 552. To this bishop Nushizad confessed his sincere repentance for having taken up arms against his father, an act which, he was convinced, could never win the approval of Heaven. Having professed himself a Christian he died, and the rebellion was quickly put down.
Many old churches remain in Iran from the early days of Christianity. Some historians regard the Assyrian Church of Mart Maryam (St. Mary) in northwestern Iran, for example, as the second-oldest church in Christendom after the Church of Bethlehem in the West Bank. A Chinese princess, who contributed to its reconstruction in 642 AD, has her name engraved on a stone on the church wall. The famous Italian traveller Marco Polo also described the church following his visit.
The Arab Islamic conquest of Persia, in the 7th century, originally benefited Christians as they were a protected minority under Islam. However, from about the 10th century religious tension led to persecution once more. The influence of European Christians placed Near Eastern Christians in peril during the Crusades. From the mid-13th century, Mongol rule was a relief to Persian Christians until the Ilkhanate adopted Islam at the turn of the 14th century. The Christian population gradually declined to a small minority. Christians disengaged from mainstream society and withdrew into ethnic ghettos (mostly Assyrian- Aramaic- and Armenian-speaking). Persecution against Christians revived in the 14th century; when the Muslim warlord of Turco-Mongol descent Timur (Tamerlane) conquered Persia, Mesopotamia, Syria, and Asia Minor, he ordered large-scale massacres of Christians in Mesopotamia, Persia, Asia Minor and Syria. Most of the victims were indigenous Assyrians and Armenians, members of the Assyrian Church of the East and of Orthodox Churches.
In 1445 a part of the Assyrian Aramaic-speaking Church of the East entered into communion with the Catholic Church (mostly in the Ottoman Empire, but also in Persia). This group had a faltering start but has existed as a separate church since Pope Julius III consecrated Yohannan Sulaqa as "Chaldean Patriarch of Babylon" in 1553. Most Assyrian Catholics in Iran today are members of the Chaldean Catholic Church. The Aramaic-speaking community that remains independent is the Assyrian Church of the East. Both churches now have much smaller memberships in Iran than the Armenian Apostolic Church.
The number of Christians in Iran was further significantly boosted through various policies of the subsequent kingdoms that ruled from 1501. For example, in 1606 during the Ottoman–Safavid War (1603–18), king Abbas I resettled some 300,000 Armenians deeper within modern-day Iran, as well as establishing their own quarter in the then-capital Isfahan, which is still largely populated by Christian Armenians some four centuries later: the New Julfa district. Other hundreds of thousands of Christian Georgians and Circassians were furthermore deported and resettled during the same Safavid era and in the later Qajar era within Iran, although both communities are exclusively Muslim nowadays.
In the 18th and 19th centuries, Protestant missionaries began to evangelize in Persia. They directed their operations towards supporting the extant churches of the country while improving education and health-care. Unlike the older, ethnic churches, these evangelical Protestants began to engage with the ethnic Persian Muslim community. Their printing presses produced much religious material in various languages. Some Persians subsequently converted to Protestantism and their churches still exist within Iran (using the Persian language).
In the early 20th century, once again Iran's stable and extant Christian population was boosted - this time due to the effects of the Assyrian Genocide (1914-1924) and the Armenian Genocide (1914-1923), as many tens of thousands of refugees poured in. However, both massacres drastically negatively affected Iran's Christian population as well, as Ottoman troops crossed the Iranian border in the later stages of World War I and massacred many tens of thousands of Armenians and Assyrians within Iran's borders as well, especially in West Azerbaijan Province, but also in adjacent provinces. Vibrant, huge and millennia-old native Christian communities in these parts of Iran were virtually shattered by the Ottoman actions, being reduced from formerly composing majorities in some of the regions, to very small - though noticeable - surviving communities. Prior to World War I and the Assyrian Genocide, the population of Urmia was 40% to 50% Christian, for example. Nowadays, this number for the same city lies at 1% to 2%.
In 1918, during the Persian Campaign, about half of the Assyrians of Persia died in Turkish and Kurdish massacres and in related outbreaks of starvation and disease. About 80 percent of Assyrian clergy and spiritual leaders perished, threatening the nation's ability to survive as a unit.
Current situation.
In 1976, the census reported that the Christian population of Iran holding citizenship there numbered 168,593 people, with most of them being Armenians. Due to the Iran–Iraq War in the 1980s and the dissolution of the Soviet Union in the 1990s, almost half of the Armenians migrated to the newly independent Armenia, but one estimate from 1999 placed the number as high as 310,000. Other estimates since 2000 have placed the number of Christians with Iranian citizenship as high as 109,415 in 2006.
Significant immigration of Assyrians from Iraq has been recorded during this period, due to massacres and harassment in post-Saddam Iraq. However, most of those Assyrians in Iran do not have Iranian citizenship, and therefore aren't included in the data. In 2008, the central office of the International Union of Assyrians was officially transferred to Iran after being hosted in the United States for more than four decades.
The government guarantees the recognized Christian minorities a number of rights (production and sale of non-halal foods), representation in parliament, special family law etc. According to US-based Barnabas Fund government intrusion, expropriation of property, forced closure and persecution, particularly in the initial years after the Iranian Revolution, have all been documented.
On 2 February 2018, four United Nations human rights experts said that members of the Christian minority in Iran, particularly those who have converted to Christianity, are facing severe discrimination and religious persecution in Iran. They expressed their concerns over treatment of three Iranian Christians imprisoned in Iran.
Iranian Christians tend to be urban, with 50% living in Tehran.
Christianity remains the second-largest non-Muslim minority religion in the country.
A June 2020 online survey found a much smaller percentage of Iranians stating they believe in Islam, with half of those surveyed indicating they had lost their religious faith. The poll, conducted by the Netherlands-based GAMAAN (Group for Analyzing and Measuring Attitudes in Iran), using online polling to provide greater anonymity for respondents, surveyed 50,000 Iranians and found 1.5% identified as Christians.
Christian converts from Islam.
Beginning in the 1970s some Protestant pastors started to hold church services in homes in Persian, rather than in one of the ethnic Christian minority languages such as Armenian or Syriac. One of the key leaders who spearheaded this movement was the Assemblies of God bishop Haik Hovsepian Mehr. Worshiping in homes, rather than in church buildings, and utilizing the national language (Persian) which was spoken by all Muslims, combined with dissatisfaction at violence connected to the Iranian Revolution led to substantial numbers of Iranian Muslims departing Islam and converting to Christianity. This took place both within Iran and abroad, among the Iranian diaspora. It is currently illegal to distribute Christian literature in the official language, Persian.
Muslims who change their faith to Christianity are subject to societal and official pressure which may lead to the death penalty. Although the Civil Code does not provide explicitly for the death penalty – with the crime being punishable by fines, lashing, and prison terms – judges can impose the death penalty if they desire.
Pentecostal pastor Hossein Sudmand was charged with apostasy and executed in 1990. Mehdi Dibaj was arrested and imprisoned for more than 10 years before he was sentenced to death in 1993, but after international pressure, he was freed in 1994, although the death sentenced was not lifted. He was murdered the next year. In 2011, Youcef Nadarkhani, an Jammiat-e Rabbani pastor, was allegedly sentenced to death for refusing to recant his faith. More recently the Iranian-American pastor and former Muslim Saeed Abedini, who in 2013 was sentenced to eight years prison, allegedly "Helped to build the country’s underground Christian church network". Iranian official sources have denied these claims.
Satellite TV networks, such as Mohabat TV, Sat7 Pars, and TBN Nejat TV distribute educational and encouraging programs for Christians, especially targeting Persian speakers. Some Christian ex-Muslims emigrate from Iran for educational, political, security or economic reasons.
It is difficult to obtain accurate figures for Protestants of all denominations and Catholics in Iran. Complicating the matter is the mixture of ethnic identity with religious affiliation, and the number of Muslim converts to Christianity, who as discussed above have a strong incentive to conceal themselves. Most informants often referred to "only a few thousand" in estimating the overall numbers of non-ethnic Christians in Iran. According to the data from the mid 1990s, all Protestant churches in Iran claimed an ethnic and Iranian membership of 5,000, 8,000, 10,000 or 15,000. A 2015 study estimated (describing this as a conservative estimate) that there were 100,000 Christian believers from a Muslim background living in Iran, most of them evangelical or Pentecostal Christians.
In May 2019 Iran's Intelligence Minister Mahmoud Alavi expressed concern over Iranian Muslims converting to Christianity and said the Intelligence Ministry have dispatched agents active in "countering the advocates of Christianity" to areas where there is a potential for people to convert.
The Bible in languages of Iran.
Armenian and Assyrian Christians use Bibles in their own languages.
Multiple Persian translations and versions of the Bible have been translated in more recent times, although distribution of Christian literature in Persian is currently illegal.
Portions of the Bible are translated into Azeri, Mazanderani, Gilaki, Bakhtiari, Luri, Kurdish, Kurmanji, and Sorani.