Accused to be leading a plot against the Spanish government in Calabria in 1599, supposedly supported by a Turkish fleet, Campanella was almost labeled as a renegade. On the contrary, while in jail, he deepened his prophetic interpretation of the history, and of the future of the world, offered theological and political confutation of Islam, and began shaping a wider idea of the role of this religion in the ‘apocalyptic’ times. Not focusing on the Turkish menace only, he tries to (...) integrate some of the Muslim kingdoms in his appeal to the universal recognition of the Christian revelation as ‘natural reason’. In his main work about this topic, Quod reminiscentur, completed in 1618, but published only in the 20th Century, Campanella presents different strategies of conversion of Islamic peoples, depending on the various historical features of Islam, and adapted to the diverse societies involved. Giovanni Botero’s Relationi universali was a very important source of Campanella’s historical and geographic information about Islam, but the philosopher developed an original prophetic and political vision of Church, conversion and apocalypse, alternative to that dominating in the Counter Reformation. (shrink)