Afonso I of Kongo: Christian King and Critic of the Slave Trade

Afonso I was king of Kongo, a large state in west-central Africa, from about 1509 to 1542. Born Mvemba a Nzinga, he made Catholic Christianity the official religion of his kingdom and sent his sons to be educated in Portugal. He is also remembered for letters to the Portuguese king protesting that merchants were illegally enslaving his subjects, among the earliest African criticisms of the Atlantic slave trade.

Kongo and the Portuguese

The Kingdom of Kongo had been founded around the late 14th century south of the lower Congo River, in what is now northern Angola and western Democratic Republic of the Congo. Its king, the manikongo, ruled from the capital Mbanza Kongo over a set of provinces governed by appointed nobles.

Portuguese ships under Diogo Cão reached the mouth of the Congo in 1483. Relations soon became friendly, and in 1491 King Nzinga a Nkuwu was baptised with the name João I. His son Mvemba a Nzinga, then governor of the province of Nsundi, was baptised at around the same time and took the name Afonso.

João I’s enthusiasm for the new faith soon cooled, and a party at court opposed the Christians. Afonso, however, remained a committed Catholic and kept close ties with the Portuguese priests and craftsmen in the kingdom.

Kongo at this time was a wealthy and well-organised state. Its people farmed millet, sorghum and later maize, wove fine raffia cloth that served both as clothing and as money, and used nzimbu shells, gathered on the royal island of Luanda, as currency. The king controlled the supply of shells and appointed the governors of the provinces, which gave the monarchy real power over the nobility.

The struggle for the throne

João I died around 1506, though some historians place his death closer to 1509. Kongo had no fixed rule of succession, and the throne was contested between Afonso and his half-brother Mpanzu a Kitima, who had stronger support among non-Christian nobles.

Afonso marched on the capital with a small force of followers and Portuguese supporters and won a decisive battle there. In his own later account, he attributed the victory to a miraculous vision of the cross and of Saint James on horseback, which frightened the enemy army. Mpanzu a Kitima was captured and executed. The victory became a founding story of Christian Kongo and was commemorated in the kingdom’s coat of arms and festivals.

A Christian kingdom

Afonso set out to build a Catholic state. Mbanza Kongo was renamed São Salvador, and churches were built there, including a church that later became a cathedral. Schools were set up for the sons of nobles, and Christian rituals were added to royal ceremonies.

He sent young nobles, including his son Henrique, to study in Portugal. In 1518 Pope Leo X authorised Henrique’s appointment as a bishop, making him one of the first black African bishops of the Catholic Church. Henrique returned to Kongo in the early 1520s but achieved little before his death around 1531.

Afonso himself studied Christian texts with great energy. In 1516 a Portuguese priest, Rui de Aguiar, wrote to King Manuel that the Kongo king knew the prophets, the Gospels and the lives of the saints better than the priests themselves, and that he spent long hours reading and teaching his people.

Historians stress that Kongo Christianity was not simply imported. Kongo nobles and teachers translated Christian ideas into local religious concepts, and the church developed a distinctive Kongo character that lasted for centuries.

In 1512 King Manuel I of Portugal sent a long set of instructions, known as the regimento, proposing Portuguese-style law, titles and courts for Kongo. Afonso adopted some elements, such as Portuguese noble titles, but kept control of his own government.

The letters of 1526

Portuguese demand for captives grew rapidly in the early 16th century, especially for the sugar plantations of the island of São Tomé. Portuguese merchants, many based on São Tomé, began to bypass royal control and buy people directly from local traders, including some who had been kidnapped.

In letters written in 1526 to King João III of Portugal, Afonso complained that merchants were seizing free people, including nobles and members of his own family, and selling them abroad. He argued that this disorder was depopulating his land and undermining his authority, and asked Portugal to limit the number of merchants and to send priests and teachers instead.

The same year Afonso created a commission of officials to inspect every captive before export and confirm that they had been lawfully enslaved, for example as prisoners of war. This did not end the trade: Afonso’s aim was to control it, not abolish it, and Kongo continued to export captives during his reign.

The letters as a historical source

Around two dozen of Afonso’s letters survive, most of them in the Portuguese national archive in Lisbon. They were written in Portuguese by the king or by Kongo secretaries trained in mission schools, and they are among the oldest surviving documents written by an African ruler in a European language. In the 20th century they were published by the Portuguese historian António Brásio in his collection of missionary documents, Monumenta Missionaria Africana.

The letters cover many subjects besides the slave trade: requests for priests, teachers, doctors and ships, complaints about the behaviour of Portuguese residents, disputes over trade and accounts of Kongo’s own affairs. They show a ruler who saw himself as a Christian king equal to his Portuguese counterpart, and who used writing as a tool of diplomacy. Later writers, including mid-20th-century historians of the slave trade, made the 1526 letters widely known.

Later reign and death

Afonso’s later years brought new tensions with Portuguese residents. In 1540, on Easter Sunday, a group of Portuguese in São Salvador tried to shoot him during Mass; he escaped with only a minor wound. He continued to write to Lisbon and Rome to defend Kongo’s independence and its church.

Afonso died in 1542 or early 1543. His son Pedro I succeeded him, but was overthrown in 1545 by Afonso’s grandson Diogo I, who ruled until 1561.

Myths and facts

• Myth: Afonso was an abolitionist. Fact: he protested illegal enslavement of free Kongo subjects and tried to regulate the trade, but did not oppose slavery or the export of war captives as such.
• Myth: Afonso was a puppet of Portugal. Fact: he adopted Christianity and some Portuguese customs, but defended Kongo’s sovereignty and dealt with the Portuguese king as an equal Christian monarch.
• Myth: Kongo Christianity was only a veneer. Fact: historians such as John Thornton argue that Christianity took deep root in Kongo and remained a central part of its identity for centuries.

Timeline

• 1483: Portuguese ships under Diogo Cão reach the mouth of the Congo River.
• 1491: King Nzinga a Nkuwu is baptised as João I; Mvemba a Nzinga is baptised as Afonso.
• c. 1506–1509: João I dies; Afonso defeats Mpanzu a Kitima and becomes king.
• 1512: Manuel I of Portugal sends the regimento to Kongo.
• 1518: Pope Leo X authorises the appointment of Afonso’s son Henrique as a bishop.
• 1526: Afonso writes to João III protesting illegal enslavement and creates an inspection commission.
• 1540: Afonso survives an assassination attempt by Portuguese residents on Easter Sunday.
• 1542–1543: Afonso dies; a succession struggle follows.

Why it matters

Afonso I made Kongo one of the first African states to adopt Christianity in the early modern period and to deal with a European power through letters and diplomacy. His protests against illegal enslavement show how African rulers tried, and largely failed, to control a trade that would feed the Middle Passage. Kongo’s later conflicts with Portugal, including the Battle of Mbwila in 1665, show how fragile that balance proved.