Ottoman sultans and Spanish kings, along with their tax officials, took a strong interest in the religious identity of those who crossed the areas of the Mediterranean under their control. Sometimes, in an era marked by the clash of Christian and Muslim empires, the Mediterranean seems to be sharply divided between the two faiths. Yet the Ottomans had long accepted the existence of Christian majorities in many of the lands they ruled, while other groups navigated (metaphorically) between religious identities. The Sephardic Jews have already been encountered, with their astonishing ability to mutate into notionally Christian ‘Portuguese’ when they entered the ports of Mediterranean Spain. This existence suspended between worlds set off its own tensions in the seventeenth century, when many Sephardim acclaimed a deluded Jew of Smyrna as the Messiah. Similar tensions could also be found among the remnants of the Muslim population of Spain. The tragic history of the Moriscos was played out largely away from the Mediterranean Sea between the conversion of the last openly practising Muslims, in 1525, and the final act of their expulsion in 1609; it was their very isolation from the Islamic world that gave these people their distinctive identity, once again suspended between religions. The world inhabited by these Moriscos differed in important respects from that inhabited by the other group of conversos, those of Jewish descent. Although some Moriscos were hauled before the Inquisition, the Spanish authorities at first turned a blind eye to the continued practice of Islam; it was sometimes possible to pay the Crown a ‘service’ that bought exemption from interference by the Inquisition, which was mortified to discover that it could not boost its income by seizing the property of exempt suspects. Many Morisco communities lacked a Christian priest, so the continued practice of the old religion is no great surprise; even in areas where christianization took place, what sometimes emerged was an islamized Christianity, evinced in the remarkable lead tablets of Sacromonte, outside Granada, with their prophecies that ‘the Arabs will be those who aid religion in the last days’ and their mysterious references to a Christian caliph, or successor (to Jesus, not Muhammad).