United Kingdom of Portugal, Brazil and the Algarves in the context of "Cisplatina"

The Kingdom of Portugal was a monarchy in the western Iberian Peninsula and the predecessor of the modern Portuguese Republic. Existing to various extents between the mid-12th century and the early 20th century, it was also known as the Kingdom of Portugal and the Algarves after 1471, and was the main constituent of the United Kingdom of Portugal, Brazil and the Algarves, which existed between 1815 and 1822. It coexisted with the Portuguese Empire, the realm's overseas colonies.

The nucleus of the Portuguese state was the County of Portugal, established in the 9th century as part of the Reconquista by Vímara Peres, a vassal of the King of Asturias. The county became part of the Kingdom of León in 1097, and the Counts of Portugal established themselves as rulers of an independent kingdom in the 12th century, following the Battle of São Mamede. The kingdom was ruled by the Afonsine Dynasty until the 1383–85 Crisis, after which the monarchy passed to the House of Aviz.

The independence of Brazil comprised a series of political and military events that led to the independence of the Kingdom of Brazil from the United Kingdom of Portugal, Brazil and the Algarves as the Brazilian Empire. It is celebrated on 7 September, the date when prince regent Pedro of Braganza declared the country's independence from the United Kingdom of Portugal, Brazil and the Algarves on the banks of the Ipiranga brook in 1822 on what became known as the Cry of Ipiranga. Formal recognition by Portugal came with the Treaty of Rio de Janeiro, signed in 1825.

In 1807, the French army invaded Portugal, which had refused to participate in the continental blockade against the United Kingdom. Unable to resist the invasion, the Portuguese royal family and government fled to Brazil, which was then the richest and most developed of the Portuguese colonies. The installation of the House of Appeals and other public bodies of the Portuguese government in Rio de Janeiro represented a series of political, economic and social transformations that led to then prince regent John of Braganza (later king John VI of Portugal), to elevate the State of Brazil to the status of a kingdom on 16 December 1815, united with its former metropolis.

Colonial Brazil (Portuguese: Brasil Colonial), sometimes referred to as Portuguese America, comprises the period from 1500, with the arrival of the Portuguese, until 1815, when Brazil was elevated to a kingdom in union with Portugal. During the 300 years of Brazilian colonial history, the main economic activities of the territory were based first on brazilwood extraction (brazilwood cycle), which gave the territory its name; sugar production (sugar cycle); and finally on gold and diamond mining (gold cycle). Slaves, especially those brought from Africa, provided most of the workforce of the Brazilian export economy after a brief initial period of Indigenous slavery to cut brazilwood.

In contrast to the neighboring Spanish possessions, which had several viceroyalties, the colony of Brazil was settled mainly in the coastal area by the Portuguese and a large black slave population working on sugar plantations and mines.

Rio de Janeiro, and also known as Rio, is the capital of the state of Rio de Janeiro. It is the second-most-populous city in Brazil after São Paulo and the sixth-most-populous city in the Americas.

Founded in 1565, the city was initially the seat of the Captaincy of Rio de Janeiro, a domain of the Portuguese Empire. In 1763, it became the capital of the State of Brazil. In 1808, when the Portuguese Royal Court moved to Brazil, Rio de Janeiro became the seat of the court of Queen Maria I of Portugal. Under the leadership of her son, prince regent John of Braganza, Maria raised Brazil to the dignity of a kingdom, within the United Kingdom of Portugal, Brazil, and Algarves. Rio remained as the capital of the pluricontinental monarchy until 1822, when the Brazilian War of Independence began. This is one of the few instances in history that the capital of a colonizing country officially shifted to a city in one of its colonies. Rio de Janeiro subsequently served as the capital of the Empire of Brazil, until 1889, and then the capital of republican Brazil until 1960 when the capital was transferred to Brasília.

Rio de Janeiro (Brazilian Portuguese pronunciation: [ˈʁi.u d(ʒi) ʒɐˈne(j)ɾu] ) is one of the 27 federative units of Brazil. It has the second largest economy of Brazil, with the largest being that of the state of São Paulo. The state, which has 8.2% of the Brazilian population, is responsible for 9.2% of the Brazilian GDP.

The state of Rio de Janeiro is located within the Brazilian geopolitical region classified as the Southeast (assigned by IBGE). Rio de Janeiro shares borders with all the other states in the same Southeast macroregion: Minas Gerais (N and NW), Espírito Santo (NE) and São Paulo (SW). It is bounded on the east and south by the South Atlantic Ocean. Rio de Janeiro has an area of 43,653 km (16,855 sq mi). Its capital is the city of Rio de Janeiro, which was the capital of the Portuguese Colony of Brazil from 1763 to 1815, of the following United Kingdom of Portugal, Brazil and the Algarves from 1815 to 1822, and of later independent Brazil as a kingdom and republic from 1822 to 1960.

This is a list of Portuguese monarchs who ruled from the establishment of the Kingdom of Portugal, in 1139, to the deposition of the Portuguese monarchy and creation of the Portuguese Republic with the 5 October 1910 revolution.

Through the nearly 800 years in which Portugal was a monarchy, the kings held various other titles and pretensions. Two kings of Portugal, Ferdinand I and Afonso V, claimed the crown of Castile and waged wars in order to enforce their respective claims. Ferdinand I managed to be recognized as King of Galiza in 1369, although his dominance of the region was short-lived. When the House of Habsburg came into power, the kings of Spain, Naples, and Sicily also became kings of Portugal. The House of Braganza brought numerous titles to the Portuguese Crown – some honorary, such as the attribution of the title of Rex Fidelissimus (His Most Faithful Majesty), and royal titles, such as King of Brazil and then de jure Emperor of Brazil.

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.

The Portuguese royal court transferred from Lisbon to the Portuguese colony of Brazil in a strategic retreat of Queen Maria I, Prince Regent John (the future King John VI), the Braganza royal family, its court, and senior officials, totaling nearly 10,000 people, on 27 November 1807. The embarkment took place on 27 November, but due to weather conditions, the ships were only able to depart on 29 November. The Braganza royal family departed for Brazil just days before Napoleonic forces invaded Portugal on 1 December 1807. The Portuguese crown remained in Brazil from 1808 until the Liberal Revolution of 1820 led to the return of John VI of Portugal on 26 April 1821.

For thirteen years, Rio de Janeiro functioned as the capital of the United Kingdom of Portugal, Brazil and the Algarves in what some historians call a metropolitan reversal (i.e., a colony exercising governance over the entirety of an empire). The period in which the court was located in Rio brought significant changes to the city and its residents, and can be interpreted through several perspectives. It had profound impacts on Brazilian society, economics, infrastructure, and politics. The transfer of the prince regent and the royal court "represented the first step toward Brazilian independence, since the prince regent immediately opened the ports of Brazil to foreign shipping and turned the colonial capital into the seat of government."

The Kingdom of Brazil (Portuguese: Reino do Brasil) was a constituent kingdom of the United Kingdom of Portugal, Brazil and the Algarves.