This chapter provides an introduction to the analysis of the efflorescence of apocalyptic beliefs and practices among Moriscos. The last Spanish Muslims to be forcibly converted to Catholicism in sixteenth-century Spain, Moriscos and their descendants were also referred to as New Christians. The chapter describes how Moriscos were not impervious to the apocalyptic excitement of their Old Christian counterparts, such as reading the same prophecies of St. Isidore of Seville and John of Rupescissa. It also explains how Morisco political culture and practice were transformed, amd it highlights events in which Moriscos met such powerful Mediterranean actors like the Ottomans, the French monarch Henry IV, and the Saʿdī sultans of Morocco.