

The reasoning for his conversion is unclear. Afonso played a leading role in Kongo's conversion to Christianity and helped to establish and promote the Roman Catholic Church in the region.

His father converted to Christianity following the arrival of the Portuguese, and Mvemba a Nzinga added "Afonso" to his name, later becoming known as King Afonso I of Kongo. In the first half of the 16th century, Kongo was ruled by Mvemba a Nzinga. In 2017, the entire city of M'banza-Kongo was declared a UNESCO World Heritage Site. The Portuguese set up colonies in Kongo territory, where they would set up a Roman Catholic church that would become one of the strongest churches in all of Africa. It's large population made it a prosperous and wealthy trading hub that eventually attracted the attention of European powers. The city grew rapidly in an otherwise sparsely-populated region, and by the 17th century, it contained about one-fifth of the entire Kongo population (around 100,000 people). It can trace its origins back to the late 14th century, when Lukeni lua Nimi conquered the city of Mwene Kabunga and renamed it M'banza-Kongo.

The Kingdom of Kongo was a small, but prosperous kingdom located on the west coast of sub-Saharan Africa.
