Queen consort of Portugal as wife of John VI, Infant of Spain, Infant consort of Portugal, Princess consort of Brazil, Princess regent consort of Portugal and Queen consort of the United Kingdom of Portugal, Brazil and Algarves. She was the eldest daughter and surviving child of King Charles IV of Spain and his wife Maria Luisa of Parma.
On 8 May 1785 Carlota Joaquina was officially married to the future John VI, King of Portugal, Brazil and the Algarves, the second son of Queen Maria I of Portugal and the late King Peter III of Portugal. The marriage was not consummated until 9 January 1790, when she was 14.
In 1788, when his eldest brother Joseph, Prince of Brazil, died, John became the first in line to his mother’s throne. Soon he received the titles Prince of Brazil and 15th Duke of Braganza. Between 1788 and 1816, Carlota Joaquina was known as Princess of Brazil. John, her husband, was good-natured, indolent, corpulent and almost as ugly as she was. His religious observances bored her, and they were quite incompatible. Nevertheless they produced nine children and, because they were all handsome, it was rumoured that especially the younger ones had a different father. After the birth of the ninth child they began to live separate lives, he at Mafra Palace and she at Queluz Palace or Ramalh?o Palace. Here it was rumoured that she had bought a retreat where she indulged in sexual orgies.
Queen Carlota Joaquina died on 7 January 1830, at age 54, at the Queluz Royal Palace, outside of Sintra. It is speculated whether she died because of natural causes or whether she, in fact, killed herself.
Link to Wikipedia biography