The object of this article is an anonymous Italo-Spanish pamphlet printed in Venice in 1687: Breve compendio di notabili vaticinii che famosi autori fecero contro il superbo Imperio, è Casa Ottomana. It is an occasional text in the service of the Holy League created in 1684, and it comprises various prophecies on the decadence of the Ottoman Empire, which was expected to end in 1690. It praises the Venetian Republic and the Emperor Leopold, and reserves an important place for the interpretation of the verses of a 16th century Portuguese poet, Gonçalo Anes Bandarra, who was considered as a prophet in his time. This article gives an edition of the Italian text, and examines its sources and its political ideology.