Lisbon Regicide
The assassination of King Carlos and the Prince Royal was the effective end of a constitutional monarchy in Portugal (later confirmed by the 5 October 1910 revolution). The regime functioned for another 33 months with growing agitation and demands for reform (although considerably less than in the future First Republic). It cannot be denied that the weak and permissive attitude in the Government of Acclamation was an incentive for the Republican Party to attempt another coup. The assassinations did not change the system of government; instead, they delayed the change.
History of Portugal (1777–1834)
In 1828, Prince Miguel returned from Austria, becoming Pedro's lieutenant and replacing their sister Princess Isabel Maria, who was ill, as regent. Over the next few months, absolutist politicians, clergymen and supporters of Queen Carlota manipulated political developments and eventually deposed Maria da Glória (who had not yet arrived in Portugal) and proclaimed Miguel King of Portugal. They also annulled the liberal Constitution, persecuted liberals and their supporters, and attempted to obtain international support for their regime. Thousands of liberal idealists were killed, arrested, or forced to flee to Spain, England, the Azores and Brazil. This usurpation was followed by demonstrations in support of absolutism and failed revolutions to reinstate liberalism.