Dom Manuel II, "the Patriot" or "the Unfortunate", was the last King of Portugal, ascending the throne after the assassination of his father, King Carlos I, and his elder brother, Luís Filipe, the Prince Royal. Before ascending the throne he held the title of Duke of Beja. His reign ended with the fall of the monarchy during the 5 October 1910 revolution, and Manuel lived the rest of his life in exile in Twickenham, Middlesex, England.

The Lisbon Regicide or Regicide of 1908 was the assassination of King Carlos I of Portugal and the Algarves and his heir-apparent, Luís Filipe, Prince Royal of Portugal, by assassins sympathetic to Republican interests and aided by elements within the Portuguese Carbonária, disenchanted politicians and anti-monarchists. The events occurred on 1 February 1908 at the Praça do Comércio along the banks of the Tagus River in Lisbon, commonly referred to by its antiquated name Terreiro do Paço.