Many Congolese converted to Catholicism during the French colonial period. Christian churches are most prevalent in the city, where the Roman Catholic Church has an Archdiocese. Since then, churches have been established by new immigrants and by local adoption of evangelical Protestantism. Examples include the Basilica of Sainte-Anne-du-Congo in Brazzaville, Greek Orthodox Archdiocese of Brazzaville and Gabon (Patriarchate of Alexandria and All Africa), Evangelical Church of Congo (World Communion of Reformed Churches), and Assemblies of God.