The archaeology of the period A.D. 500-1000 has taken off in the Mediterranean (where prehistoric and classical studies formerly enjoyed a virtual monopoly in most areas) and in the Islamic world. Here, as in northern Europe, field survey, careful excavation and improved methods of dating are beginning to supply information which now is not only more abundant but also of much higher quality than ever before. The 'New Archaeology', pioneered in the United States in the 1960s, has taught the archaeologist the value of anthropological models in the study of the past. The new data and models...