The Ancient, Most Noble and Enlightened Military Order of Saint James of the Sword, of the Scientific, Literary and Artistic Merit (Portuguese: Antiga, Nobilíssima e Esclarecida Ordem Militar de Sant'Iago da Espada, do Mérito Científico, Literário e Artístico), before 1910 Royal Military Order of Saint James of the Sword (Portuguese: Real Ordem Militar de Santiago da Espada) is a Portuguese order of chivalry.