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
After issuing a new Constitution for Portugal on 29 April 1826, and as already announced in that Constitution, Emperor-King Pedro abdicated the Portuguese Crown in favour of his daughter, Princess Maria da Glória, on 2 May 1826. Princess Maria da Glória thus became Queen Maria II of Portugal. The document by which the Brazilian Emperor abdicated the Portuguese Crown was signed days before the first meeting of the Parliament established by the Brazilian Constitution of 1824, that assembled for the first time on 6 May 1826. Before his abdication, on 26 April, King Pedro confirmed the Regency of Portugal that had been established by his father during his final illness, and that was led by the Infanta Isabel Maria, his sister. As the new Queen Maria II was still a minor, Portugal would need to be led by Regents during her minority. On 30 April, King Pedro IV set the date for the first legislative elections under the new Portuguese Constitution and appointed Peers of the Realm.