Christianity in Africa began in Egypt in the middle of the 1st century. By the end of the 2nd century it had reached the region around Carthage. Important Africans who influenced the early development of Christianity include Tertullian, Perpetua, Felicity, Clement of Alexandria, Origen of Alexandria, Cyprian, Athanasius and Augustine of Hippo. In the 4th century the Aksumite empire was Christianized, and the Nubian kingdoms of Nobatia, Makuria and Alodia followed two centuries later.
Since the spread of Islam into North Africa, the size of Christian congregations as well as their number was reduced, so that of the original churches only the Eastern Orthodox Church of Alexandria and Coptic Orthodox Church of Alexandria (which separated from each other during the Chalcedonian Schism) in Egypt and the Orthodox Tewahedo Church (that split into Ethiopian Orthodox Tewahedo Church and Eritrean Orthodox Tewahedo Church) in the Horn of Africa remained. The Ethiopian church held its own distinct religious customs and a unique canon of the Bible. The Ethiopian church community in the Horn of Africa wasn't the product of European missionary work, rather, it had spread through missionaries much earlier (while the P'ent'ay churches are works of a Protestant reformation within Ethiopian Christianity). The position of the head of the Catholic Church of Africa (Archdiocese of Carthage), the only one permitted to preach in the continent, in 1246 belonged to the bishop of Morocco. The bishopric of Marrakesh continued to exist until the late 16th century.
Christianity is embraced by the majority of the population in most Southern African, Southeast African, and Central African states and others in some parts of Horn of Africa and West Africa. The Coptic Christians make up a significant minority in Egypt. The World Book Encyclopedia has estimated that in 2002 Christians formed 40% of the continent's population, with Muslims forming 45%. In a relatively short time, Africa has gone from having a majority of followers of indigenous, traditional religions, to being predominantly a continent of Christians and Muslims. Since 2013, traditional African religions are declared as the majority religion only in Togo. Importantly, today within most self-declared Christian communities in Africa, there is significant and sustained syncretism with African Traditional Religious beliefs and practices.
New data from the Gordon Theological Seminary shows that, for the first time ever, more number of Christians live in Africa than on any other single continent.
"The results show Africa on top with 631 million Christian residents, Latin America in 2nd place with 601 million Christians, and Europe in 3rd place with 571 million Christians."
Mark the Evangelist became the first bishop of the Orthodox Church of Alexandria in about the year 43. At first the church in Alexandria was mainly Greek-speaking. By the end of the 2nd century the scriptures and liturgy had been translated into three local languages. Christianity in Sudan also spread in the early 1st century, and the Nubian churches, which were established in the sixth century within the kingdoms of Nobatia, Makuria and Alodia were linked to those of Egypt.
Christianity also grew in northwestern Africa (today known as the Maghreb). The churches there were linked to the Church of Rome and provided Pope Gelasius I, Pope Miltiades and Pope Victor I, all of them Christian Berbers like Saint Augustine and his mother Saint Monica.
At the beginning of the 3rd century the church in Alexandria expanded rapidly, with five new suffragan bishoprics. At this time, the Bishop of Alexandria began to be called Pope, as the senior bishop in Egypt. In the middle of the 3rd century the church in Egypt suffered severely in the persecution under the Emperor Decius. Many Christians fled from the towns into the desert. When the persecution died down, however, some remained in the desert as hermits to pray. This was the beginning of Christian monasticism, which over the following years spread from Africa to other parts of the Gohar, and Europe through France and Ireland.
The early 4th century in Egypt began with renewed persecution under the Emperor Diocletian. In the Ethiopian/Eritrean Kingdom of Aksum, King Ezana declared Christianity the official religion after having been converted by Frumentius, resulting in the promotion of Christianity in Ethiopia (eventually leading to the foundation of the Ethiopian Orthodox Tewahedo Church).
In these first few centuries, African Christian leaders such as Origen, Lactantius, Augustine, Tertullian, Marius Victorinus, Pachomius, Didymus the Blind, Ticonius, Cyprian, Athanasius and Cyril (along with rivals Valentinus, Plotinus, Arius and Donatus Magnus) influenced the Christian world outside Africa with responses to Gnosticism, Arianism, Montanism, Marcionism, Pelagianism and Manichaeism, and the idea of the University (after the Library of Alexandria), understanding of the Trinity, Vetus Latina translations, methods of exegesis and biblical interpretation, ecumenical councils, monasticism, Neoplatonism and African literary, dialectical and rhetorical traditions.
Many causes have been seen as to leading to the decline of Christianity in the Maghreb. One of them is the constant wars and conquests as well as persecutions. In addition many Christians also migrated to Europe. The Church at that time lacked the backbone of a monastic tradition and was still suffering from the aftermath of heresies including the so-called Donatist heresy, and that this contributed to the early obliteration of the Church in the present day Maghreb. Some historians contrast this with the strong monastic tradition in Coptic Egypt, which is credited as a factor that allowed the Coptic Church to remain the majority faith in that country until around after the 14th century despite numerous persecutions. In addition, the Romans and the Byzantines were unable to completely assimilate the indigenous people like the Berbers.
Another view however that exists is that Christianity in North Africa ended soon after conquest of North Africa by the Islamic Umayyad Caliphate between AD 647-709 effectively.
However, new scholarship has appeared that disputes this. There are reports that the Roman Catholic faith persisted in the region from Tripolitania (present-day western Libya) to present-day Morocco for several centuries after the completion of the Arab conquest by 700. A Christian community is recorded in 1114 in Qal'a in central Algeria. There is also evidence of religious pilgrimages after 850 to tombs of Catholic saints outside the city of Carthage, and evidence of religious contacts with Christians of Muslim Spain. In addition, calendar reforms adopted in Europe at this time were disseminated amongst the indigenous Christians of Tunis, which would have not been possible had there been an absence of contact with Rome.
Local Catholicism came under pressure when the Muslim regimes of the Almohads and Almoravids came into power, and the record shows demands made that the local Christians of Tunis convert to Islam. There are reports of Christian inhabitants and a bishop in the city of Kairouan around 1150 AD - a significant event, since this city was founded by Arab Muslims around 680 AD as their administrative center after their conquest. A letter in Catholic Church archives from the 14th century shows that there were still four bishoprics left in North Africa, admittedly a sharp decline from the over four hundred bishoprics in existence at the time of the Arab conquest. The Almohad Abd al-Mu'min forced the Christains and Jews of Tunis to convert in 1159. Ibn Khaldun hinted at a native Christian community in 14th century in the villages of Nefzaoua, south-west of Tozeur. These paid the jizuah and had some people of Frankish descent among them.Berber Christians continued to live in Tunis and Nefzaoua in the south of Tunisia up until the early 15th century, and in the first quarter of the 15th century we even read that the native Christians of Tunis, though much assimilated, extended their church, perhaps because the last Christians from all over the Maghreb had gathered there. However, they were not in communion with the Catholic church. The community of Tunisian Christians existed in the town of Tozeur up to the 18th century.
In June 1225, Honorius III issued the bull Vineae Domini custodes that permitted two friars of the Dominican Order named Dominic and Martin to establish a mission in Morocco and look after the affairs of Christians there. The bishop of Morocco Lope Fernandez de Ain was made the head of the Church of Africa, the only church officially allowed to preach in the continent, on 19 December 1246 by Innocent IV.
The medieval Moroccan historian Ibn Abi Zar stated that the Almohad caliph Abu al-Ala Idris al-Ma'mun had built a church in Marrakech for the Christians to freely practice their faith at Fernando III's insistence. IV asked emirs of Tunis, Ceuta and Bugia to permit Lope and Franciscian friars to look after the Christians in those regions. He thanked the Caliph al-Sa'id for granting protection to the Christians and requested to allow them to create fortresses along the shores, but the Caliph rejected this request.
Another phase of Christianity in Africa began with the arrival of Portuguese in the 15th century. After the end of Reconquista, the Christian Portuguese and Spanish captured many ports in North Africa.
The bishopric of Marrakesh continued to exist until the late 16th century and was borne by the suffragans of Seville. Juan de Prado who had attempted to re-establish the mission was killed in 1631. A Franciscan monastery built in 1637 was destroyed in 1659 after the downfall of the Saadi dynasty. A small Franciscan chapel and monastery in the mellah of the city existed until the 18th century.
The growth of Catholicism in the region after the French conquest was built on European colonizers and settlers, and these immigrants and their descendants mostly left when the countries of the region became independent. As of the last census in Algeria, taken on 1 June 1960, there were 1,050,000 non-Muslim civilians (mostly Catholic) in Algeria (10 percent of the total population including 140,000 Algerian Jews).
In 2009, the UNO counted 45,000 Roman Catholics and 50,000 to 100,000 Protestants in Algeria. Conversions to Christianity have been most common in Kabylie, especially in the wilaya of Tizi Ouzou. In that wilaya, the proportion of Christians has been estimated to be between 1% and 5%. A 2015 study estimates 380,000 Muslims converted to Christianity in Algeria.
In Morocco the expatriate Christian community (Roman Catholic and Protestant) consists of 5,000 practicing members, although estimates of Christians residing in the country at any particular time range up to 25,000. Most Christians reside in the Casablanca, Tangier and Rabat urban areas. The majority of Christians in Morocco are foreigners, although Voice of the Martyrs reports there is a growing number of native Moroccans (45,000) converting to Christianity, especially in the rural areas. Many of the converts are baptized secretly in Morocco's churches.
The Christian community in Tunisia, composed of indigenous residents, Tunisians of Italian and French descent, and a large group of native-born citizens of Berber and Arab descent, numbers 50,000 and is dispersed throughout the country.The Office for Democracy, Human Rights and Labor in the United States also noted the presence of thousands of Tunisians who converted to Christianity .
Within different geographical areas, Africans searched for aspects of Christianity that could more closely resemble their religious and personal practices. Adaptations of Protestantism, such as the Kimbanguist church emerged. Within the Kimbanguist church, Simon Kimbangu questioned the order of religious deliverance- would God send a white man to preach? The Kimbanguist church believed Jesus was black and regarded symbols with different weight than the Catholic and Protestant Europeans. The common practice of placing crosses and crucifixes in churches was viewed as a graven image in their eyes or a form of idolatry. Also, according to Mazrui, Kimbanguists respected the roles of women in church more than orthodox churches; they gave women the roles of priests and preachers. Members within these churches looked for practices in the Bible that were not overtly condemned, such as polygamy. They also incorporated in their own practices relationships with objects and actions like dancing and chanting.  When Africans were able to read in the vernacular, they were able to interpret the Bible in their own light. Polygamy was a topic of debate- many literate Africans interpreted it as acceptable because of information contained in the Old Testament- while it was condemned by European Christianity. Dona Beatriz was a woman from Central Africa known for her controversial views on the acceptance of polygamy- she argued that Jesus never condemned it- and she was burnt at the stake. European missionaries were faced with what they considered an issue in maintaining victorian values, while still promoting the vernacular and literacy. Missionaries largely condemned the controversial African views and worked against leaders branching out. Simon Kimbangu became a martyr, put in a cage because of Western missionaries concern, and died there.
Within African communities, there were clashes brought on by Christianization. Young leaders formed ideas based on Christianity and challenged elders. Dona Beatriz, an African prophet, made Christianity political and eventually went on to become an African Nationalist, planning to overthrow the Ugandan state with the help of other prophets. According to Paul Kollman, teaching from missionaries was up to the interpretation of each person and took different forms when acted upon. 
David Adamo, a Nigerian within the Aladura church chose portions of the Bible that closely resembled what his church found important. They read portions of Psalms because of the idea that missionaries were not sharing the power of their faith. They found power in reading these verses and put them into the context of their lives.
In addition to Africanizing Christianity, there were movements to Africanize Islam. In Nigeria, movements were created to arouse Muslims to de-Arabize Islam. There were clashes between people who accepted the de-Arabization and those who did not. These movements took place around 1980, resulting in violent behavior and clashes with police. Mirza Ghulam Ahmed, the founder of the Ahmadiyya sect, believed that the prophet Muhammed was the most important prophet, but not the last- departing from typical Muslim views. Sunni Africans were largely against the Ahmadiyyas; the Ahmadiyyas were the first to translate the Quran into Swahili, and the Sunnis opposed that as well. There was a militarism developed in different groups and movements like the Ahmadiyyas and the Mahdist movement and clashes between groups with opposing views.
Jesuits missionary expeditions began as early as 1548 in various Regions of Africa. In 1561, Gonçalo da Silveira, a Portuguese missionary, managed to baptize Monomotapa, king of the Shona people in the territory of Zimbabwe. A modest sized group of Jesuits began to establish their presence in the area of Abyssinia, or Ethiopia Superior, around the same time of Silveira's presence in Southern Africa. Although Jesuits regularly confronted persecution and harassment, their mission withstood the test of time for nearly a century. Despite this confrontation, they found success in instituting Catholic doctrine in a region that, prior to the existence of their vocation, maintained strictly established orthodoxies. During the sixteenth century, Jesuits extended their occupation into the old Kongo Kingdom, developing upon a preexisting Catholic mission which had culminated in the construction of a local church. Jesuit missions functioned similarly in Mozambique and Angola until in 1759 the Society was overcome by Portuguese authority.
The Jesuits went largely unchallenged by rival denominational missions in Africa. Other religious congregations did exist who sought to evangelize regions of the continent under Portuguese dominion, however, their influence was far less significant than that of the Christians. The Jesuit's ascendency to prominence began with the padroado in the fifteenth century and continued until other European countries initiated missions of their own, threatening Portugal's status as sole patron of the continent. The favor of the Jesuits took a negative turn in the mid eighteenth century when Portugal no longer held the same dominion in Africa as it had in the fifteenth century. The Jesuits found themselves expelled from Mozambique and Angola, as a result, the existence of Catholic missions diminished significantly in these regions.
Christians and Muslims built schools throughout the continent of Africa, teaching missionary beliefs and philosophies. It is not necessary that a practitioner of the Muslim faith understand the meaning of Arabic words when they recite the Quran. As a result of the nature of Islam in Africa, Muslim missionaries were not prompted to translate their sacred text into the native language. Unlike that of Islam, Christian missionaries were compelled to spread an understanding of their gospel in the native language of the indigenous people they sought to convert. The bible was then translated and communicated in these native languages. Christian schools did teach english, as well as mathematics, philosophy, and values inherent to Western culture and civilization. The conflicting branches of secularism and religiosity within the Christian schools represents a divergence between the various goals of educational institutions within Africa.
Christianity is now one of the two most widely practiced religions in Africa. There has been tremendous growth in the number of Christians in Africa - coupled by a relative decline in adherence to traditional African religions. Only nine million Christians were in Africa in 1900, but by the year 2000, there were an estimated 380 million Christians. According to a 2006 Pew Forum on Religion and Public life study, 147 million African Christians were "renewalists" (Pentecostals and Charismatics). According to David Barrett, most of the 552,000 congregations in 11,500 denominations throughout Africa in 1995 are completely unknown in the West. Much of the recent Christian growth in Africa is now due to African evangelism and high birth rates, rather than European missionaries. Christianity in Africa shows tremendous variety, from the ancient forms of Oriental Orthodox Christianity in Egypt, Ethiopia, and Eritrea to the newest African-Christian denominations of Nigeria, a country that has experienced large conversion to Christianity in recent times. Several syncretistic and messianic sections have formed throughout much of the continent, including the Nazareth Baptist Church in South Africa and the Aladura churches in Nigeria. Some evangelical missions founded in Africa such as the UD-OLGC, founded by Evangelist Dag Heward-Mills, are also quickly spreading in influence all around the world. There are also fairly widespread populations of Seventh-day Adventists and Jehovah's Witnesses.
Some experts predict the shift of Christianity's center from the European industrialized nations to Africa and Asia in modern times. Yale University historian Lamin Sanneh stated that "African Christianity was not just an exotic, curious phenomenon in an obscure part of the world, but that African Christianity might be the shape of things to come." The statistics from the World Christian Encyclopedia (David Barrett) illustrate the emerging trend of dramatic Christian growth on the continent and supposes, that in 2025 there will be 633 million Christians in Africa.
A 2015 study estimates 2,161,000 Christian believers are from a formerly Muslim background in Africa, most of them belonging to some form of Protestantism.
|url=value (help). BRILL. ISBN 0812203062., page 117-20