Dom Luís Filipe, Prince Royal of Portugal, Duke of Braganza was the eldest son and heir apparent of King Carlos I of Portugal until his assassination. Born in 1887, when his father was still Prince Royal, he was styled Prince of Beira at birth. After his paternal grandfather King Luís I of Portugal died, he became Prince Royal of Portugal and Duke of Braganza as heir apparent to the throne. Following the Lisbon Regicide that saw him and his father killed, his younger brother Manuel II became King of Portugal.