António Vieira (1608-1697) was a Portuguese Jesuit priest, diplomat, and writer known for his influential sermons and advocacy for the rights of indigenous peoples in Brazil. He played a significant role in the cultural and religious life of the Portuguese Empire during the 17th century. Vieira's works often addressed themes of justice, morality, and the relationship between Europe and its colonies. He is celebrated for his eloquent prose and deep understanding of Christianity, making him a prominent figure in Portuguese literature and a key voice in the debates surrounding colonialism and human rights.