History of Portugal (1834–1910)
Militant Republicans and their allies in the Carbonária were not willing to remain in the shadows of the constitutional monarchy. Between 4–5 October 1910, members of the Carbonária, republican youth, and elements of the army instigated a coup d'état against the already weak constitutional monarchy. The young king and his family, after a few miscues, escaped from the Palace in Mafra to exile in England. On the morning of 5 October 1910, the Republic was declared from the balcony of Lisbon City Hall, ending eight centuries of monarchy in Portugal.
Cartista
Following the Peninsular War, when the monarchy had remained transplanted in Brazil and continental Portugal was run by British-supported elites, pressure developed from professional classes to obtain more power, in light of their rule from abroad. Outward pressure eventually resulted in the 1820 Revolution, which established a Liberal constitution, investing power in the political structures and turning Portugal into a constitutional monarchy. King John VI of Portugal returned to the continent and supported this form of government, although during his reign there were pressures from the old elites such as the multiple attempts by his son Miguel of Portugal to overthrow the established Liberal constitution.