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.
List of monarchs of Brazil
Before 1815, Brazil was a colony of the Kingdom of Portugal. Thus, from the formal arrival of the Portuguese in 1500, when the land was claimed by the Portuguese Crown, until 1815 when the Kingdom of Brazil was created and the colonial bond was formally terminated and replaced by a political union with Portugal, the Kings of Portugal were monarchs "over" Brazil.