Book excerpt: The object of this book is intra-urban mobility, namely the diverse forms of mobility occuring within a city: from residential mobility to daily mobility, the latter understood both as commuting and as urban travel for leisure. The specific aim of the volume is to explore mobility in the city at different times, from the XVIIth century to today, and to relate it to the respective social dynamics from different standpoints, moving back and forth from the building to the neighbourhood and the wider metropolis, from Tunis to Paris, from Naples to Barcelone, passing through Rome, Milan and Marseille. The approach adopted is strongly multidisciplinary. The authors come from different disciplines - from History to Demography, from Sociology to Geography -, which has allowed to decline the study of intra-urban mobility both through a look at individuals and their mobility practices and from a territorial and historical context. In so doing, a set of urban issues has been considered, such as social mobility, metropolization processes, migrations and inequalities, access to real estate market.