Estado Novo (Portugal)
King Carlos I of Portugal confirmed colonial treaties of the 19th century that stabilized the situation in Portuguese Africa. These agreements were, however, unpopular in Portugal, where they were seen as being to the disadvantage of the country. In addition, Portugal was declared bankrupt twice—first on 14 June 1892 and again on 10 May 1902—causing industrial disturbances, socialist and republican antagonism, and press criticism of the monarchy. Carlos responded by appointing João Franco as Prime Minister and subsequently accepting Parliament's dissolution. In 1908, Carlos I was assassinated in Lisbon. The Portuguese monarchy lasted until 1910 when, through the 5 October revolution, it was overthrown and Portugal was proclaimed a republic. The overthrow of the Portuguese monarchy in 1910 led to a 16-year struggle to sustain parliamentary democracy under republicanism – the Portuguese First Republic (1910–1926).
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.