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The Most Serene House of Braganza (Portuguese: Sereníssima Casa de Bragança), or the Brigantine Dynasty (Dinastia Brigantina), is a dynasty of emperors, kings, princes, and dukes of Portuguese origin, a branch of the House of Aviz.
Founded by Afonso I, 1st Duke of Braganza, illegitimate son of King John I of Portugal, the Braganzas were one of the wealthiest and most powerful noble houses of the Iberian Peninsula of the Renaissance period. The house came to rule the Kingdom of Portugal and the Algarves following the successful deposition of the Philippine Dynasty by John IV of Portugal, in 1640. With the creation of the United Kingdom of Portugal, Brazil and the Algarves, in 1815, and the subsequent independence of the Empire of Brazil, in 1822, the Braganzas came to rule as the monarchs of Brazil.
The House of Braganza produced 15 Portuguese monarchs and 4 monarchs of Brazil, numerous consorts to various European kingdoms, such as Catherine of Braganza (wife of Charles II of England) and Maria Isabel of Braganza (wife of Ferdinand VII of Spain), as well as sometime candidates for the thrones of Poland and Greece, Infante Manuel, Count of Ourém and Pedro, Duke of Braganza, respectively, and numerous other notable figures in the histories of Europe and the Americas. The Braganzas were deposed from their thrones at the turn of the 19th-20th centuries, when Emperor Pedro II was deposed in Brazil, in 1889, and when King Manuel II was deposed in Portugal, in 1910.