Carloctavismo (also carlosoctavismo, carlooctavismo, carlos-octavismo, carlo-octavismo, octavismo) is a branch of Carlism, particularly active in the 1943–1953 period. In terms of dynastical allegiances it advanced the claim to the Spanish throne of Carlos Pio de Habsburgo-Lorena y de Borbón, styled as Carlos VIII, and his relatives. In terms of political line it collaborated very closely with Francoism.