Maria I of Portugal (d. 1816)
Dona Maria I (17 December 1734 – 20 March 1816) was Queen of Portugal from 24 February 1777 until her death in 1816. Known as Maria the Pious in Portugal and Maria the Mad in Brazil, she was the first undisputed queen regnant of Portugal and the first monarch of Brazil.
Maria was the eldest daughter of King Dom José I (Joseph I) of Portugal and Infanta Doña Mariana Victoria of Spain. As the heir to the throne, she held the titles of Princess of Brazil and Duchess of Braganza. She married her uncle Infante Dom Pedro (Peter) in 1760. They had six children, of whom three survived infancy: Dom José (Joseph), Prince of Brazil; King Dom João VI (John VI) of Portugal; and Infanta Mariana Vitória. The death of King José in 1777 placed Maria, then 42 years old, on the throne. Her husband Pedro was nominally king alongside her as Dom Pedro III.
Upon ascending the throne, Maria dismissed her father's powerful chief minister, Sebastião José de Carvalho e Melo, 1st Marquis of Pombal. The early part of Maria's reign witnessed growth in Portugal's economy. Maria had a number of national buildings constructed and renovated, leading to the completion of the Palace of Queluz and the inauguration of the Palace of Ajuda and other new monuments. The death of her husband in 1786, followed by the deaths in 1788 of her eldest son José and her confessor Inácio de São Caetano, caused the queen to develop clinical depression. Her second son, João, then served as prince regent. With Napoleon's European conquests, Maria and her court moved to the Portuguese colony of Brazil in 1807. After Brazil was elevated to a kingdom in 1815, Maria became Queen of the United Kingdom of Portugal, Brazil and the Algarves. Upon her death in 1816, her son succeeded her as King Dom João VI.