Archaeology is fundamentally concerned with both space and time: dates, chronologies, stratigraphy, plans and maps are all routinely used by archaeologists in their work. To aid in their analysis of this material, the use of Geographic Information Systems (GIS) by archaeologists has become widespread. However, GIS are conventionally ignorant of time. Thus, if archaeologists are to achieve the fullest potential in the application of GIS to their studies, GIS are needed that properly take into account time as well as space. A GIS capable of dealing with temporal data is referred to as a temporal-GIS (TGIS), and commercial TGIS systems currently exist. However, these are locked into a model of modern clock time. Archaeological time does not sit well within that model, being altogether fuzzier and less precise. The creation of that new TGIS is the subject of this book: a fuzzy TGIS built specifically for the study of archaeological data that also takes into account recent developments in the theory of temporality within the discipline. The new TGIS is applied to two case studies, one in prehistoric Derbyshire and one in Roman Northamptonshire, producing informative and interesting new results.