Rio de Janeiro, commonly referred to as simply Rio, is the second largest city in Brazil, the sixth largest city in the Americas and the world's thirty-fifth largest city by population. The metropolis is anchor to the Rio de Janeiro metropolitan area, ranked as the second most populous metropolitan area in Brazil, the sixth most populous in the Americas and the eighteenth largest in the world. Rio de Janeiro is the capital of the state of Rio de Janeiro, Brazil's third most populous state. Part of the city has been designated as a World Heritage Site, named "Rio de Janeiro: Carioca Landscapes between the Mountain and the Sea", identified by UNESCO on 1 July 2012 in the category Cultural Landscape.Founded in 1565, by the Portuguese, the city was initially the seat of the Captaincy of Rio de Janeiro, a captaincy of the Portuguese Empire. It later, in 1793, became the capital of the State of Brazil, a State of the Portuguese Empire. In 1808, when the Portuguese Royal Court transferred itself from Portugal to Brazil, Rio de Janeiro became the chosen seat of the court of Queen Maria I of Portugal, who subsequently, in 1815, under the leadership of her son, the Prince Regent, and future King João VI of Portugal, raised Brazil to the dignity of a kingdom, within the United Kingdom of Portugal, Brazil, and Algarves. Rio stayed the capital of the pluricontinental Lusitanian monarchy until 1822, when the War of Brazilian Independence began. It subsequently served as the capital of the independent monarchy, the Empire of Brazil, until 1889, and then the capital of a republican Brazil until 1960.