The Brotherhood of Our Ladier da Boa Morte de Cachoeira’ “BA, was 200 years old in 2020 and its trajectory is essential for the preservation of the traditions of the African diaspora. The Brotherhood is a symbol of resistance and an example of strategies for the creation and maintenance of social and cultural practices that have fought the colonial order in Bahia and Brazil. The influence of the Brotherhood has spread over various social and cultural symbols of the black population, but many nuances of that history are still unknown or ignored by traditional historiography due to a problem of ‘lack of sources’. Those and other ‘problems’ of studying the Afro-Brazilian traditions must be questioned so that we can understand to what extent they interfere with work on such organisations and the importance of orality in the transmission, perpetuation and study of these traditions.