British–Brazilian Treaty of 1826
treaty requiring Brazil to abolish the slave trade
The British–Brazilian Treaty of 1826 was a treaty between the United Kingdom and the Empire of Brazil, by which Brazil agreed to ban the African slave trade.
It was signed at Rio de Janeiro on 23 November 1826. Exchange of ratifications took place on 13 March 1827, and the Parliament of the United Kingdom passed legislation on 2 July 1827 to enforce the treaty, the Slave Trade (Convention with Brazil) Act 1827 (7 & 8 Geo. 4. c. 74).
In 1827 Emperor Pedro I presented the treaty to the Chamber of Deputies for its approval; its Committee for Diplomacy and Statistics approved the convention by three votes to two. In response, on 2 July 1827, deputy Raimundo José da Cunha Mattos, a member of the Committee who opposed the treaty, delivered a two-hour speech in defence of the continuation of the slave trade.
The treaty made it illegal for any subject of the empire of Brazil to be engaged in carrying out the African slave trade. It provided a three-year grace period after the exchange of ratifications, which meant that the ban took effect on 13 March 1830.
The public source identifies “British–Brazilian Treaty of 1826” as treaty requiring Brazil to abolish the slave trade. This brief keeps that definition visible, then builds a research path around British, Brazilian and Treaty.
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Contemporary correspondence, administrative files and participant testimony can test how later narratives organized the event or institution. The source revision retrieved here is dated Sep 18, 2026. The linked authority identifier is Q98446911. None of the 1 selected statements returned an explicit reference. The first chronological checks are 1826, 1827 and 1830.
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This entry incorporates text from “British–Brazilian Treaty of 1826” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.