Kingdom of Portugal
After the Portuguese Restoration War of 1640–1668, the kingdom passed to the House of Braganza and thereafter to the House of Braganza-Saxe-Coburg and Gotha. From this time, the influence of Portugal declined, but it remained a major power due to its most valuable colony, Brazil. After the independence of Brazil, Portugal sought to establish itself in Africa, but was ultimately forced to yield to the British interests, leading to the collapse of the monarchy in the 5 October 1910 revolution and the establishment of the First Portuguese Republic.
United Kingdom of Portugal, Brazil and the Algarves
On 20 March 1816 Queen Maria I died in Rio de Janeiro. The Prince John, the Prince Regent, then became King John VI, the second monarch of the United Kingdom, retaining the numbering of Portuguese Sovereigns. After a period of mourning and several delays, the festivities of the acclamation of the new King were held in Rio de Janeiro on 6 February 1818.