In the first century of Islam, most of the former Christian Roman Empire, from Syria to Spain, was brought under Muslim control in a conquest of unprecedented proportions. Confronted by the world of Islam, countless medieval Christians experienced a profound ambivalence, awed by its opulence, they were also troubled by its rival claims to the spiritual inheritance of Abraham and Jesus and humiliated by its social subjugation of non-Muslim minorities. Some converted. Others took up arms. Still others, the subjects of John Tolan's study of anti-Muslim polemics in medieval Europe, undertook to...

In the first century of Islam, most of the former Christian Roman Empire, from Syria to Spain, was brought under Muslim control in a conquest of unprecedented proportions. Confronted by the world of Islam, countless medieval Christians experienced a profound ambivalence, awed by its opulence, they were also troubled by its rival claims to the spiritual inheritance of Abraham and Jesus and humiliated by its social subjugation of non-Muslim minorities. Some converted. Others took up arms. Still others, the subjects of John Tolan's study of anti-Muslim polemics in medieval Europe, undertook to...

In September, 1219, as the armies of the Fifth Crusade besieged the Egyptian city of Damietta, Francis of Assisi went to Egypt to preach to Sultan al-Malik al-Kamil.
Although we in fact know very little about this event, this has not prevented artists and writers from the thirteenth century to the twentieth, unencumbered by mere facts, from portraying Francis alternatively as a new apostle preaching to the infidels, a scholastic theologian proving the truth of Christianity, a champion of the crusading ideal, a naive and quixotic wanderer, a crazed religious fanatic, or a medieval Gandhi...