Christianity arrived in Guinea-Bissau with Portuguese traders and missionaries in the 15th century, but only in its coastal regions. Active missionary efforts started only in the 20th century, and in 1977 it became a diocese of the Holy See. and the Christian community predominantly consists of the
Papel,
Manjak, and
Balanta ethnic groups. Catholics make up over half of the Christian population, whereas Brazilian Protestant denominations and other Protestant groups maintain numerous congregations and missions across the nation. Christianity is perceived to be expanding in Guinea-Bissau, particularly among adherents of traditional religions. It is projected that by 2050, Christians will constitute approximately 30% of the population in Guinea-Bissau. ==Freedom of religion==