Al-Andalus, the Iberian Islamic civilization centred on Cordoba in the tenth and eleventh centuries, has been a ‘lost’ civilization in several respects. Its history suppressed or denied for much of the nineteenth and twentieth centuries, it was regarded as a kind of ‘historical parenthesis’ with no lasting influence. Over the past twenty-five years, however, the history and archaeology of the Islamic period in the Iberian peninsula has undergone a complete transformation. Lost Civilization presents an introduction to this debate as it has played out in archaeology, taking a comparative civilizations approach that puts the formation of al-Andalus in context with corresponding developments elsewhere in Europe, North Africa and the Middle East.