The Treaty of Madrid was a document signed by Spain and Portugal concerning their empires and status of their slave plantations in what is now Brazil. Earlier treaties authored by both countries, and as mediated by the Catholic Church of Rome, stipulated that the Portuguese empire in South America could extend no further than the 50th parallel. The Treaty of Madrid allowed further expansion of the slave holding Portuguese Empire at the expense of the non-slave holding Empire of Spain. This expansion eventually led to the formation of the Empire of Brazil, which did not ban slavery until 1865.

External Links

The Madrid Treaty - 1750 (http://www.terragaucha.com.br/tratado_de_madri_eng.htm)
South America in the SYW (http://www.netcomuk.co.uk/~dpohara/santa.html)