“We tend nowadays to forget that for approximately a thousand years, from the advent of Islam in the seventh century until the second siege of Vienna in 1683, Christian Europe was under constant threat from Islam, the double threat of conquest and conversion. Most of the new Muslim domains were wrested from Christendom. Syria, Palestine, Egypt, and North Africa were all Christian countries, no less, indeed rather more, than Spain and Sicily. All this left a deep sense of loss and a deep fear.”
