Peter III of Portugal in the context of "John VI of Portugal"

Dom John VI (Portuguese: João Maria José Francisco Xavier de Paula Luís António Domingos Rafael; 13 May 1767 – 10 March 1826), known as "the Clement" (o Clemente), was King of the United Kingdom of Portugal, Brazil and the Algarves from 1816 to 1825, and after the recognition of Brazil's independence, titular Emperor of Brazil and King of Portugal until his death in 1826.

John VI was born in Lisbon during the reign of his maternal grandfather, King Dom Joseph I of Portugal. He was the second son of the Princess of Brazil and Infante Peter of Portugal, who later became Queen Dona Maria I and King Dom Peter III. In 1785, John married Carlota Joaquina of Spain, with whom he had nine children. He became heir to the throne when his older brother, Prince José, died of smallpox in 1788. Before his accession to the throne, John bore the titles Duke of Braganza, Duke of Beja, and Prince of Brazil. From 1799, he served as prince regent due to his mother's mental illness. In 1816, he succeeded his mother as monarch of the Portuguese Empire, with no real change in his authority, since he already possessed absolute powers as regent.

Dona Maria I (Maria Francisca Isabel Josefa Antónia Gertrudes Rita Joana; 17 December 1734 – 20 March 1816) also known as Maria the Pious in Portugal and Maria the Mad in Brazil, was Queen of Portugal from 24 February 1777 until her death in 1816. Maria 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 Queen Mariana Victoria. As the heir to the throne, she held the titles of Princess of Brazil and Duchess of Braganza. She married her uncle Infante Pedro (Peter) in 1760. They had six children, of whom three survived infancy: José, João (John), and 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.

The Palace of Queluz (Portuguese: Palácio de Queluz, Portuguese pronunciation: [kɛˈluʃ]) is an 18th-century palace located at Queluz, a city of the Sintra Municipality, in the Lisbon District, on the Portuguese Riviera. One of the last great Rococo buildings to be designed in Europe, the palace was conceived as a summer retreat for King Joseph I's brother, Peter of Braganza, later to become husband and king jure uxoris (as King Peter III) to his own niece, Queen Maria I. It eventually served as a discreet place of incarceration for Maria I, when she became afflicted by severe mental illness in the years following Peter III's death in 1786. Following the destruction of the Palace of Ajuda by fire in 1794, Queluz Palace became the official residence of the Portuguese Prince Regent John, and his family, and remained so until the royal family fled to the Portuguese colony of Brazil following the French invasion of Portugal (1807).

Work on the palace began in 1747 under Portuguese architect Mateus Vicente de Oliveira. Despite being far smaller, the palace is often referred to as the "Portuguese Versailles." From 1826, the palace slowly fell from favour with the Portuguese sovereigns. In 1908, it became the property of the state. Following a serious fire in 1934, which gutted one-third of the interior, the palace was extensively restored, and today is open to the public as a major tourist attraction.