Brazil
- Personal union with Portugal, under Peter I of Brazil (Peter IV of Portugal), from 10 March 1826, to 28 May 1826. Peter was the Prince Royal of Portugal, Brazil and the Algarves when he declared the independence of Brazil in 1822, becoming its first emperor. When his father (John VI of Portugal) died, Peter also became King of Portugal for only several weeks, after which he abdicated the Portuguese throne in favour of his younger child, Princess Maria da Glória.
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