Carlos Duarte Costa (July 21, 1888 – March 26, 1961) was the founder and first patriarch of the Brazilian Catholic Apostolic Church and its international extension, the Worldwide Communion of Catholic Apostolic National Churches. A former Roman Catholic bishop, he was excommunicated by Pope Pius XII for doctrinal and canonical issues (such as clerical celibacy). Duarte Costa has been canonized as "St. Carlos of Brazil" by the Brazilian Catholic Apostolic Church.