 From the 17th century on, and as the Portuguese Empire slowly crumbled, the dream became increasingly more mystical.Greater importance was given to Luís de Camões and his masterpiece, "Os Lusíadas", which exalted Portugal as a nation of heroes aided by the classical gods.The third cycle of "Mensagem", called "O Encoberto" ("The Hidden One") refers to Fernando Pessoa's vision of a future world of peace and understanding, the Fifth Empire, which will come about through a Portuguese of mystical origin to which he refers by a number of names including "The Hidden One", "The King" or "King Sebastian".